0001127537-24-000052 | 10-Q | XBRL Viewer

Print Document

Summary of Significant Accounting Policies (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Accounting Policies [Abstract]
Cash on deposit with foreign banks	$ 4,300,000		$ 4,700,000
Other comprehensive (loss) income, foreign currency translation adjustments	(549,000)	$ 72,000
Foreign currency transaction gains and (losses)	400,000	$ 100,000
Accounts receivable, allowance for credit loss	$ 0		$ 0

Commitments and Contingencies

3 Months Ended

Mar. 31, 2024

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Leases

The Company has a lease for its headquarters location in Redwood City, California. In October 2019, the Company renewed its lease for the headquarters location in Redwood City, California for an additional five years commencing in August 2020 and expiring in July 2025. The monthly base rent during the renewed term is $0.1 million and is subject to an annual increase of 3.5%. The Company is responsible for its share of real estate taxes, common area maintenance and management fees.

During 2013, the Company entered into a five-year lease for office facilities in Switzerland. The Company had an option to extend the lease through January 2022, which was not exercised by the Company. Per the lease terms, in the event the option to extend is not exercised, the lease remains in force and can be terminated with 12-months’ notice.

In April 2020, the Company executed a sublease for another office facility in Redwood City, California for a three-year term commencing on June 1, 2020 (the “Sublease Agreement”). The Sublease Agreement provides for early termination if the Company or Sublandlord elects to terminate the lease by providing the other party at least 180 days prior written notice. The early termination may only occur on or after the expiration of the 18th full calendar month of the sublease term. The monthly base rent during the term is less than $0.1 million and is subject to an annual increase of 3.5%. The Company is responsible for its share of real estate taxes, common area maintenance and management fees.

In September 2020, the Company amended the Sublease Agreement to include additional facility space in Redwood City, California for a four-year term (the “First Amendment to Sublease Agreement”). The First Amendment to Sublease Agreement was accounted as a separate sublease agreement. The First Amendment to Sublease Agreement contained a rent-free period through February 14, 2021, after which rent is approximately $0.1 million per month and is subject to an annual increase of 3.5%. The Company is responsible for its share of real estate taxes, common area maintenance and management fees. The Company is eligible to receive a tenant improvement allowance of $0.7 million to fund facility enhancements. The First Amendment to Sublease Agreement can be extended for an additional twelve-month period, at the Company’s option. For accounting purposes, the lease term is 4 years as it is not reasonably certain that the Company will exercise the renewal option. The First Amendment to Sublease Agreement also changed the lease term entered into in April 2020, which was extended until May 31, 2024, but left the early termination clause unchanged. In September 2021, the Company became reasonably certain that the early termination clause would not be exercised as capital expenditures on the facility build-out created sufficient disincentive to terminate the lease early. The lease term was reevaluated and extended from November 30, 2021 to May 31, 2024. In April 2023, the Company entered into a Second Amendment to Sublease Agreement (the “Second Amendment to Sublease Agreement”) to remove the early termination clause and extend the lease term by four months to expire contemporaneously with the expiration date as defined in Sublease Agreement. The amendment was accounted for as a modification that resulted in additional right of use assets in exchange for lease liabilities of $0.2 million.

As of March 31, 2024, the Company has leases on fourteen vehicles with an average lease term of 3.0 years.

Operating lease cost consists of the following (in thousands):


	Three Months Ended March 31,
	2024		2023
Operating lease cost	$	722	$	721
Short-term lease cost	9		8
Variable lease cost	289		154
Total lease cost	$	1,020	$	883

The following table summarizes a maturity analysis of the Company’s lease liabilities showing the aggregate lease payments as of March 31, 2024 (in thousands):


Fiscal Year Ending December 31,	Amount
2024 (remaining nine months)	$	2,309
2025	1,098
2026	31
Total minimum lease payments	3,438
Less: Amount of lease payments representing interest	98
Present value of future minimum lease payments	$	3,340
Less: Current lease liabilities	2,690
Long-term lease liabilities	$	650

The following table summarizes additional information related to the Company’s operating leases (in thousands, except weighted average data):


	March 31,			December 31,
	2024			2023
Right of use asset	$	2,705		$	3,406
Weighted average remaining lease term (years)	1.14			1.35
Weighted average discount rate	6.7		%	6.7		%

The following table summarizes other supplemental information related to the Company’s operating leases (in thousands):


	Three Months Ended March 31,
	2024		2023
Cash paid for amounts included in the measurement of lease liabilities included in cash flows used in operating activities	$	910	$	872
Right-of-use assets obtained in exchange for lease liabilities	$	—	$	—

Service Agreement

In April 2022, the Company entered into an agreement with a service provider which requires total minimum purchases of $0.6 million, $0.4 million, and $0.4 million over a three-year period. From inception of the agreement through March 31, 2024, the Company recorded $1.1 million of expense for services related to this agreement in cost of goods sold.

Contingencies

From time to time, the Company may be a party to various litigation claims in the normal course of business. Legal fees and other costs associated with such actions are expensed as incurred. The Company assesses, in conjunction with legal counsel, the need to record a liability for litigation and contingencies. Accrual estimates are recorded when and if it is determinable that such a liability for litigation and contingencies are both probable and reasonably estimable.

In December 2022, the Company received a civil investigative demand (“CID”) from the U.S. Department of Justice, Civil Division in connection with an investigation under the Anti-Kickback Statute and False Claims Act (the “Investigation”). The CID requests information and documents regarding the Company’s relationships with certain health care providers, medical practices, and hospitals in connection with the sales and marketing of the Zephyr Valves and related products and services. The Company is fully cooperating with the Investigation. The Company is unable to express a view at this time regarding the ultimate outcome of the Investigation or estimate an amount or range of reasonably possible loss. Depending on the outcome of the Investigation, there could be a material impact on the Company’s business, results of operations and financial condition.

Balance Sheet Components - Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Raw materials	$ 3,062	$ 2,924
Work in process	440	427
Finished goods	16,248	15,972
Total inventory	19,750	19,323
Inventory	17,228	16,743
Long-term inventory	$ 2,522	$ 2,580

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Mar. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Formation and Business of the Company (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accumulated deficit	$ 424,910		$ 411,161
Cash used in operating activities	11,795	$ 12,644
Cash, cash equivalents and marketable securities	$ 120,400

- Definition

Amount of accumulated undistributed earnings (deficit).

+ References + Details

Balance Sheet Components - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Business Acquisition [Line Items]
Depreciation expense	$ 300,000	$ 300,000
Goodwill	2,333,000		$ 2,333,000
Amortization expense related to intangibles, less than	100,000	100,000
Emphasys Medical, Inc
Business Acquisition [Line Items]
Goodwill	2,300,000		$ 2,300,000
Goodwill acquired	0	0
Goodwill disposed of	0	$ 0
Goodwill, impairment loss	$ 0

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References + Details

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2024	Dec. 31, 2023
Stockholders’ equity
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	38,812,175	38,516,383
Common stock, shares outstanding (in shares)	38,812,175	38,516,383

Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2024

Commitments and Contingencies Disclosure [Abstract]

Schedule of Operating Lease Cost and Additional Information

Operating lease cost consists of the following (in thousands):


	Three Months Ended March 31,
	2024		2023
Operating lease cost	$	722	$	721
Short-term lease cost	9		8
Variable lease cost	289		154
Total lease cost	$	1,020	$	883

The following table summarizes additional information related to the Company’s operating leases (in thousands, except weighted average data):


	March 31,			December 31,
	2024			2023
Right of use asset	$	2,705		$	3,406
Weighted average remaining lease term (years)	1.14			1.35
Weighted average discount rate	6.7		%	6.7		%

The following table summarizes other supplemental information related to the Company’s operating leases (in thousands):


	Three Months Ended March 31,
	2024		2023
Cash paid for amounts included in the measurement of lease liabilities included in cash flows used in operating activities	$	910	$	872
Right-of-use assets obtained in exchange for lease liabilities	$	—	$	—

Schedule of Maturity Analysis of Lease Liabilities

The following table summarizes a maturity analysis of the Company’s lease liabilities showing the aggregate lease payments as of March 31, 2024 (in thousands):


Fiscal Year Ending December 31,	Amount
2024 (remaining nine months)	$	2,309
2025	1,098
2026	31
Total minimum lease payments	3,438
Less: Amount of lease payments representing interest	98
Present value of future minimum lease payments	$	3,340
Less: Current lease liabilities	2,690
Long-term lease liabilities	$	650

Long Term Debt

3 Months Ended

Mar. 31, 2024

Debt Disclosure [Abstract]

Long Term Debt

CIBC Loan

On February 20, 2020, the Company executed a Loan and Security Agreement with Canadian Imperial Bank of Commerce (“CIBC”), which the Company subsequently amended on April 17, 2020 and December 28, 2020 (as amended, the “CIBC Agreement”). The CIBC Agreement originally provided the Company with the ability to borrow up to $32.0 million in debt financing (“CIBC Loan”) consisting of $17.0 million advanced at the closing of the agreement (“Tranche A”), with the option to draw up to an additional $8.0 million (“Tranche B”) and an additional financing tranche (“Tranche C”) of up to $7.0 million on or prior to February 20, 2022. Neither Tranche B nor Tranche C was drawn before the option expired.

The CIBC Loan originally had a five-year term maturing on February 20, 2025, which included 24 months of interest only payments followed by 36 months of equal payments of principal and interest.

In April 2020, the Company entered into a First Amendment to CIBC Agreement that changed the maturity date to March 15, 2022, which would be automatically extended to February 20, 2025 if the maturity of all outstanding convertible notes was extended to a date no earlier than May 21, 2025 or all convertible notes converted into convertible preferred stock of the Company. An amendment fee of $0.2 million was paid. The amendment was accounted for as a debt modification and no gain or loss was recognized.

In December 2020, to address certain post-close covenants for which the Company was not in compliance, the Company entered into a Second Amendment to the CIBC Agreement that extended the compliance of such covenants to June 30, 2021.

In March 2021, the Company entered into an Amended and Restated Loan and Security Agreement with CIBC (as amended, the “Amended and Restated CIBC Agreement”) which, among other things, extended the loan maturity date of the CIBC Loan from March 15, 2022 to February 20, 2025, and modified certain financial covenants. Per the amended terms, 36 equal payments of principal plus accrued interest would be due beginning March 31, 2022. In connection with the Amended and Restated CIBC Agreement, the Company paid fees to CIBC of less than $0.1 million which were recorded as a discount on the CIBC Loan and are being accreted over the life of the term loan using the effective interest method. The amendment was accounted for as a debt modification and no gain or loss was recognized.

In June 2021, the Company entered into a First Amendment to the Amended and Restated CIBC Agreement that extended the compliance of certain post-close covenants to March 31, 2022.

In October 2021, the Company entered into a Second Amendment to the Amended and Restated CIBC Agreement, which extended the interest only period of the loan from 24 months to 36 months. Under the amended terms, principal repayment will begin in February 2023. There was no change to the loan interest rate or maturity date.

In October 2022, the Company entered into a Third Amendment to the Amended and Restated CIBC Agreement (the “Third Amendment”) with CIBC, which amended certain provisions of the CIBC Loan. The amendment provided the option to draw up to an additional $20.0 million (“Amended Tranche B”) on or prior to October 31, 2023, which can be drawn in increments of at least $5.0 million. Upon request by the Company, CIBC may, in its sole discretion, make additional term loans of up to $10.0 million (“Amended Tranche C”) at any time. The Third Amendment extended the maturity date of the CIBC Loan from February 20, 2025 to October 31, 2027 and provided for a new interest only period of 24 months from the signing date of the Third Amendment, with the possibility of an additional extension of such interest only period of up to 12 months, subject to satisfaction of certain conditions set forth in the Third Amendment. The Company paid a commitment fee of less than $0.1 million in connection with the Third Amendment. The amendment was accounted for as a debt modification and no gain or loss was recognized.

In February 2023, the Company drew $20.0 million of the Amended Tranche B of the CIBC Loan. The Amended Tranche B bears interest at a floating rate equal to 1.0% above the Wall Street Journal Prime Rate and has the same repayment terms as the Tranche A.

Upon draw of the Amended Tranche B, the financial covenants in the Amended and Restated CIBC Agreement require that, when the cash and cash equivalents of the Company as defined in the Amended and Restated CIBC Agreement is less than $100.0 million, the Company have revenue for the trailing three-month period ending on the last day of each fiscal quarter of not less than 80.0% of the revenue for the trailing three-month period, as set forth in the annual projections delivered to the CIBC. Further, the Company is required to maintain unrestricted cash in an aggregate amount equal to the greater of $20.0 million and the Adjusted EBITDA loss as defined in the Amended and Restated CIBC Agreement for the six-month period ending on any date of determination. As of March 31, 2024, the Company was in compliance with all covenants contained in Amended and Restated CIBC Agreement.

The CIBC Loan bears interest at a floating rate equal to 1.0% above the Wall Street Journal Prime Rate at any time. The CIBC Loan is collateralized by substantially all of the Company’s assets, including cash and cash equivalents, accounts receivable, intellectual property and equipment. The Company may prepay the borrowings under the Amended and Restated CIBC Agreement, subject to certain conditions, including a prepayment fee equal to 2.0% of the principal amount repaid during the first year after the effective date of the Third Amendment or 1.0% of the principal amount prepaid during the second year after the effective date of the Third Amendment.

As of March 31, 2024, the CIBC Loan had an annual effective interest rate of 10.1% per year.

The CIBC Loan consists of the following (in thousands):


	March 31,		December 31,
	2024		2023
Term loan	$	37,000	$	37,000
Less: debt issuance costs	(136)		(152)
Term loan	$	36,864	$	36,848
Reported as:
Short-term debt	$	5,139	$	2,056
Long-term debt	31,725		34,792
Total term loan	$	36,864	$	36,848

The Company paid $0.5 million fees to the lender and third parties which is reflected as a discount on the CIBC Loan and is being accreted over the life of the term loan using the effective interest method.

During the three months ended March 31, 2024 and March 31, 2023, the Company recorded interest expense related to debt discount and debt issuance costs of CIBC Loan of less than $0.1 million and less than $0.1 million, respectively.

Interest expense on the CIBC Loan amounted $0.9 million and $0.6 million during the three months ended March 31, 2024 and March 31, 2023, respectively.

Credit Agreement

In May 2020, Pulmonx International Sàrl, a wholly owned subsidiary of the Company, received 0.5 million Swiss Francs ($0.5 million U.S. dollar equivalent) from a COVID-19 Credit Agreement under a Swiss Federal Government program designed to mitigate the economic impact of the spread of the coronavirus. The COVID-19 Credit Agreement initially bore no interest through March 31, 2023. Beginning April 1, 2023, the COVID-19 Credit Agreement bears interest at a rate of 1.5% per year, payable at the end of each calendar quarter. The loan principal is being repaid in twelve equal installments, paid semi-annually, which began in March of 2022. Interest expense was immaterial during the three months ended March 31, 2024 and March 31, 2023. As of March 31, 2024, Pulmonx International Sàrl has repaid $0.2 million to the lender.

Contractual Maturities of Financing Obligations

As of March 31, 2024, the aggregate future payments under the CIBC Loan and Credit Agreement (including interest payments) are as follows (in thousands):


Fiscal Year Ending December 31,	Amount
2024 (remaining nine months)	$	4,785
2025	15,209
2026	14,036
2027	10,816
Total	44,846
Less: unamortized debt discount	(136)
Less: interest	(7,477)
Term loan and credit agreement	$	37,233

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(c))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 470
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//470/tableOfContent

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1C
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1C

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1C
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1C

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1C
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1C

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1E
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1E

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1I
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1I

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1I
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1I

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1I
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1I

+ Details

Segment Information - Narrative (Details)	3 Months Ended
Segment Information - Narrative (Details)	Mar. 31, 2024 segment
Segment Reporting [Abstract]
Number of reportable segments	1
Number of operating segments	1

Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following tables summarizes the types of assets and liabilities measured at fair value on a recurring basis by level within the fair value hierarchy (in thousands):


	March 31, 2024
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents:
Money market funds	$	5,312	$	—	$	—	$	5,312
U.S. Government agency bonds	3,995		—		—		3,995
Commercial paper	—		2,983		—		2,983
Total cash equivalents	$	9,307	$	2,983	$	—	$	12,290
Marketable securities:
U.S. Government agency bonds	$	9,235	$	21,508	$	—	$	30,743
Commercial paper	—		19,523		—		19,523
Total marketable securities	9,235		41,031		—		50,266
Total financial assets	$	18,542	$	44,014	$	—	$	62,556


	December 31, 2023
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents:
Money market funds	$	25,129	$	—	$	—	$	25,129
Total cash equivalents	$	25,129	$	—	$	—	$	25,129
Marketable securities:
U.S. Government agency bonds	$	5,798	$	29,466	$	—	$	35,264
Commercial paper	—		12,681		—		12,681
Total marketable securities	5,798		42,147		—		47,945
Total financial assets	$	30,927	$	42,147	$	—	$	73,074

There were no liabilities measured at fair value on a recurring and non-recurring basis as of March 31, 2024 and December 31, 2023.

Schedule of Marketable Securities

The following table summarizes the cost, unrealized gains and losses and fair value of marketable securities (in thousands):


	March 31, 2024
	Amortized Cost		Unrealized Losses		Unrealized Gains		Fair Value
U.S. Government agency bonds	$	30,773	$	(43)	$	13	$	30,743
Commercial paper	19,538		(19)		4		19,523
Total	$	50,311	$	(62)	$	17	$	50,266


	December 31, 2023
	Amortized Cost		Unrealized Losses		Unrealized Gains		Fair Value
U.S. Government agency bonds	$	35,194	$	(26)	$	96	$	35,264
Commercial paper	12,667		(1)		15		12,681
Total	$	47,861	$	(27)	$	111	$	47,945

The following table summarizes the contractual maturities of the Company’s marketable securities (in thousands):


	March 31, 2024
	Amortized Cost		Fair Value
Due within one year	$	46,024	$	45,973
Due in one year to five years	4,287		4,293
Total	$	50,311	$	50,266

Schedule of Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value

The following table summarizes the marketable securities with unrealized losses as of March 31, 2024 and December 31, 2023, aggregated by major security type and the length of time that individual securities have been in a continuous loss position (in thousands):


	March 31, 2024
	Less than 12 months				12 months or greater				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
U.S. Government agency bonds	$	19,094	$	(43)	$	—	$	—	$	19,094	$	(43)
Commercial paper	13,428		(19)		—		—		13,428		(19)
Total	$	32,522	$	(62)	$	—	$	—	$	32,522	$	(62)


	December 31, 2023
	Less than 12 months				12 months or greater				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
U.S. Government agency bonds	$	11,888	$	(23)	$	1,745	$	(3)	$	13,633	$	(26)
Commercial paper	996		(1)		—		—		996		(1)
Total	$	12,884	$	(24)	$	1,745	$	(3)	$	14,629	$	(27)

- Definition

Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-9

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (aa)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (aaa)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

+ Details

Fair Value Measurements - Fair Value of Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets:
Marketable securities:	$ 50,266	$ 47,945
U.S. Government agency bonds
Assets:
Marketable securities:	30,743	35,264
Recurring Basis
Assets:
Cash equivalents:	12,290	25,129
Marketable securities:	50,266	47,945
Total financial assets	62,556	73,074
Recurring Basis \| U.S. Government agency bonds
Assets:
Cash equivalents:	3,995
Marketable securities:	30,743	35,264
Recurring Basis \| Commercial paper
Assets:
Cash equivalents:	2,983
Marketable securities:	19,523	12,681
Recurring Basis \| Money market funds
Assets:
Cash equivalents:	5,312	25,129
Recurring Basis \| Level 1
Assets:
Cash equivalents:	9,307	25,129
Marketable securities:	9,235	5,798
Total financial assets	18,542	30,927
Recurring Basis \| Level 1 \| U.S. Government agency bonds
Assets:
Cash equivalents:	3,995
Marketable securities:	9,235	5,798
Recurring Basis \| Level 1 \| Commercial paper
Assets:
Cash equivalents:	0
Marketable securities:	0	0
Recurring Basis \| Level 1 \| Money market funds
Assets:
Cash equivalents:	5,312	25,129
Recurring Basis \| Level 2
Assets:
Cash equivalents:	2,983	0
Marketable securities:	41,031	42,147
Total financial assets	44,014	42,147
Recurring Basis \| Level 2 \| U.S. Government agency bonds
Assets:
Cash equivalents:	0
Marketable securities:	21,508	29,466
Recurring Basis \| Level 2 \| Commercial paper
Assets:
Cash equivalents:	2,983
Marketable securities:	19,523	12,681
Recurring Basis \| Level 2 \| Money market funds
Assets:
Cash equivalents:	0	0
Recurring Basis \| Level 3
Assets:
Cash equivalents:	0	0
Marketable securities:	0	0
Total financial assets	0	0
Recurring Basis \| Level 3 \| U.S. Government agency bonds
Assets:
Cash equivalents:	0
Marketable securities:	0	0
Recurring Basis \| Level 3 \| Commercial paper
Assets:
Cash equivalents:	0
Marketable securities:	0	0
Recurring Basis \| Level 3 \| Money market funds
Assets:
Cash equivalents:	$ 0	$ 0

Stockholders' Equity - Narrative (Details)		3 Months Ended
Stockholders' Equity - Narrative (Details)	Mar. 15, 2024 USD ($)	Mar. 31, 2024 USD ($) vote shares	Mar. 31, 2023 USD ($)	Dec. 31, 2023 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (in shares) \| shares		200,000,000		200,000,000
Dividends declared		$ 0
Number of votes for each share of common stock held \| vote		1
Options granted (in shares) \| shares		638,016
Options exercisable, aggregate intrinsic value		$ 6,600,000
Options vested and expenses to vest, intrinsic value		5,800,000
Stock-based compensation expense		5,673,000	$ 4,638,000
Cost of Goods and Services Sold
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation capitalized into inventory		400,000	200,000
Inventory, Net
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation capitalized into inventory		400,000	300,000
Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 300,000
Share-based compensation, stock modification	$ 6,300,000
Inducement Grants \| Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares \| shares		630,402
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares \| shares		3,270,598		2,244,903
Options outstanding, aggregate intrinsic value		$ 30,300,000
Fair value of shares vested		$ 1,600,000	$ 800,000
Restricted Stock Units (RSUs) \| Inducement Grants \| Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares \| shares		205,286
Stock Options And Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs		$ 53,800,000
Weighted-average period for recognition of compensation costs		2 years 9 months 18 days
Employee stock purchase plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average period for recognition of compensation costs		4 months 24 days
Non-option unrecognized compensation costs		$ 200,000
Nonqualified Stock Option \| Inducement Grants \| Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares \| shares		425,116

Fair Value Measurements

3 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

Fair Value Measurements

Assets and liabilities recorded at fair value in the consolidated financial statements are categorized based upon the level of judgment associated with the inputs used to measure their fair value. Hierarchical levels which are directly related to the amount of subjectivity associated with the inputs to the valuation of these assets or liabilities are as follows:

Level 1—Inputs are unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access as of the measurement date.

Level 2—Inputs are observable, unadjusted quoted prices in active markets for similar assets or liabilities, unadjusted quoted prices for identical or similar assets or liabilities in markets that are not active or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the related assets or liabilities.

Level 3—Unobservable inputs for the asset or liability only used when there is little, if any, market activity for the asset or liability at the measurement date. This hierarchy requires the Company to use observable market data, when available, and to minimize the use of unobservable inputs when determining fair value.

Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis—Financial assets and liabilities held by the Company measured at fair value on a recurring basis include money market funds and marketable securities.

Assets and Liabilities Measured and Recorded at Fair Value on a Nonrecurring Basis—The Company determines the fair value of long-lived assets held and used, such as intangible assets, by reference to independent appraisals, quoted market prices (e.g., an offer to purchase) and other factors. An impairment charge is recorded when the carrying value of the asset exceeds its fair value. There have been no impairment charges recorded to date. Based on the borrowing rates currently available to the Company for debt with similar terms and consideration of default and credit risk, the carrying value of the term loan approximates the fair value. The fair value of the term loan is estimated using Level 2 inputs.

Assets and liabilities measured at fair value are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires management to make judgments and consider factors specific to the asset or liability.

The following tables summarizes the types of assets and liabilities measured at fair value on a recurring basis by level within the fair value hierarchy (in thousands):


	March 31, 2024
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents:
Money market funds	$	5,312	$	—	$	—	$	5,312
U.S. Government agency bonds	3,995		—		—		3,995
Commercial paper	—		2,983		—		2,983
Total cash equivalents	$	9,307	$	2,983	$	—	$	12,290
Marketable securities:
U.S. Government agency bonds	$	9,235	$	21,508	$	—	$	30,743
Commercial paper	—		19,523		—		19,523
Total marketable securities	9,235		41,031		—		50,266
Total financial assets	$	18,542	$	44,014	$	—	$	62,556


	December 31, 2023
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents:
Money market funds	$	25,129	$	—	$	—	$	25,129
Total cash equivalents	$	25,129	$	—	$	—	$	25,129
Marketable securities:
U.S. Government agency bonds	$	5,798	$	29,466	$	—	$	35,264
Commercial paper	—		12,681		—		12,681
Total marketable securities	5,798		42,147		—		47,945
Total financial assets	$	30,927	$	42,147	$	—	$	73,074

There were no liabilities measured at fair value on a recurring and non-recurring basis as of March 31, 2024 and December 31, 2023.

The following table summarizes the cost, unrealized gains and losses and fair value of marketable securities (in thousands):


	March 31, 2024
	Amortized Cost		Unrealized Losses		Unrealized Gains		Fair Value
U.S. Government agency bonds	$	30,773	$	(43)	$	13	$	30,743
Commercial paper	19,538		(19)		4		19,523
Total	$	50,311	$	(62)	$	17	$	50,266


	December 31, 2023
	Amortized Cost		Unrealized Losses		Unrealized Gains		Fair Value
U.S. Government agency bonds	$	35,194	$	(26)	$	96	$	35,264
Commercial paper	12,667		(1)		15		12,681
Total	$	47,861	$	(27)	$	111	$	47,945


	March 31, 2024
	Less than 12 months				12 months or greater				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
U.S. Government agency bonds	$	19,094	$	(43)	$	—	$	—	$	19,094	$	(43)
Commercial paper	13,428		(19)		—		—		13,428		(19)
Total	$	32,522	$	(62)	$	—	$	—	$	32,522	$	(62)


	December 31, 2023
	Less than 12 months				12 months or greater				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
U.S. Government agency bonds	$	11,888	$	(23)	$	1,745	$	(3)	$	13,633	$	(26)
Commercial paper	996		(1)		—		—		996		(1)
Total	$	12,884	$	(24)	$	1,745	$	(3)	$	14,629	$	(27)

The unrealized losses for marketable securities relate to changes in interest rates. No allowance for credit losses was recorded as of March 31, 2024 and December 31, 2023, and no impairment losses were recognized for the three months ended March 31, 2024 and March 31, 2023.

Accrued interest receivable on marketable securities of $0.2 million and $0.4 million as of March 31, 2024 and December 31, 2023, respectively, is included in prepaid expenses and other current assets on the condensed consolidated balance sheet. The Company elected to exclude accrued interest receivable from the estimation of expected credit losses on its marketable securities and reverse accrued interest receivable through interest income (expense) when amounts are determined to be uncollectible. The Company did not write off any accrued interest receivable during the three months ended March 31, 2024 and March 31, 2023.

Contractual Maturities

The following table summarizes the contractual maturities of the Company’s marketable securities (in thousands):


	March 31, 2024
	Amortized Cost		Fair Value
Due within one year	$	46,024	$	45,973
Due in one year to five years	4,287		4,293
Total	$	50,311	$	50,266

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Formation and Business of the Company	3 Months Ended
Formation and Business of the Company	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Formation and Business of the Company	Formation and Business of the Company The Company Pulmonx Corporation (the “Company”) was incorporated in the state of California in December 1995 as Pulmonx and reincorporated in the state of Delaware in December 2013. The Company is a commercial-stage medical technology company that provides a minimally invasive treatment for patients with severe emphysema, a form of chronic obstructive pulmonary disease (“COPD”). The Company’s solution, which is comprised of the Zephyr Endobronchial Valve (“Zephyr Valve”), the Chartis Pulmonary Assessment System (“Chartis System”) and the StratX Lung Analysis Platform (“StratX Platform”), is designed to treat a broad pool of patients for whom medical management has reached its limits and either do not want or are ineligible for surgical approaches. The Company has subsidiaries in Germany, Switzerland, Australia, the United Kingdom, Italy, France, Hong Kong and Japan. Liquidity and Going Concern The Company has incurred operating losses and negative cash flows from operations to date and has an accumulated deficit of $424.9 million as of March 31, 2024. During the three months ended March 31, 2024 and March 31, 2023, the Company used $11.8 million and $12.6 million of cash in its operating activities, respectively. As of March 31, 2024, the Company had cash, cash equivalents and marketable securities of $120.4 million. Historically, the Company’s activities have been financed through the sale of equity securities, debt financing arrangements and sales of its products. The Company’s unaudited interim condensed consolidated financial statements have been prepared on the basis of the Company continuing as a going concern for the next 12 months. Management believes that the Company’s existing cash, cash equivalents and marketable securities will allow the Company to continue its planned operations for at least the next 12 months from the date of the issuance of these unaudited interim condensed consolidated financial statements.

Fair Value Measurements - Cost, Unrealized Gains and Losses and Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	$ 50,311	$ 47,861
Unrealized Losses	(62)	(27)
Unrealized Gains	17	111
Marketable securities:	50,266	47,945
U.S. Government agency bonds
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	30,773	35,194
Unrealized Losses	(43)	(26)
Unrealized Gains	13	96
Marketable securities:	30,743	35,264
Commercial paper
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	19,538	12,667
Unrealized Losses	(19)	(1)
Unrealized Gains	4	15
Marketable securities:	$ 19,523	$ 12,681

Stockholders' Equity - Restricted Stock Unit Activity (Details) - Restricted Stock Units (RSUs)	3 Months Ended
	Mar. 31, 2024 $ / shares shares
Number of Shares Underlying Outstanding Restricted Stock
Unvested, beginning of period (in shares) \| shares	2,244,903
Granted (in shares) \| shares	1,385,426
Vested (in shares) \| shares	(177,610)
Canceled (in shares) \| shares	(182,121)
Unvested, end of period (in shares) \| shares	3,270,598
Weighted Average Grant Date Fair Value
Unvested, beginning of period (in dollars per share) \| $ / shares	$ 15.74
Granted (in dollars per share) \| $ / shares	9.25
Vested (in dollars per share) \| $ / shares	18.50
Canceled (in dollars per share) \| $ / shares	14.95
Unvested, end of period (in dollars per share) \| $ / shares	$ 12.89

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents	$ 70,158	$ 83,547
Restricted cash	236	237
Short-term marketable securities	45,973	33,555
Accounts receivable, net	10,522	12,105
Inventory	17,228	16,743
Prepaid expenses and other current assets	3,819	4,235
Total current assets	147,936	150,422
Long-term marketable securities	4,293	14,390
Long-term inventory	2,522	2,580
Property and equipment, net	4,218	4,028
Goodwill	2,333	2,333
Intangible assets, net	0	31
Right of use assets	2,705	3,406
Other long-term assets	577	591
Total assets	164,584	177,781
Current liabilities
Accounts payable	3,125	1,497
Accrued liabilities	10,071	16,234
Income taxes payable	67	93
Deferred revenue	110	104
Short-term debt	5,231	2,155
Current lease liabilities	2,690	3,074
Total current liabilities	21,294	23,157
Deferred tax liability	140	114
Long-term lease liabilities	650	1,106
Long-term debt	32,002	35,089
Total liabilities	54,086	59,466
Commitments and contingencies (Note 8)
Stockholders’ equity
Preferred stock, $0.001 par value, 10,000,000 shares authorized; no shares issued and outstanding as of March 31, 2024 and December 31, 2023	0	0
Common stock, $0.001 par value, 200,000,000 shares authorized as of March 31, 2024 and December 31, 2023; 38,812,175 shares issued and outstanding as of March 31, 2024 and 38,516,383 shares issued and outstanding as of December 31, 2023	39	39
Additional paid-in capital	533,406	526,797
Accumulated other comprehensive income	1,963	2,640
Accumulated deficit	(424,910)	(411,161)
Total stockholders’ equity	110,498	118,315
Total liabilities and stockholders’ equity	$ 164,584	$ 177,781

Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Statement [Abstract]
Revenue	$ 18,854	$ 14,535
Cost of goods sold	4,776	3,946
Gross profit	14,078	10,589
Operating expenses
Research and development	4,210	4,253
Selling, general and administrative	24,404	22,736
Total operating expenses	28,614	26,989
Loss from operations	(14,536)	(16,400)
Interest income	1,441	1,127
Interest expense	(883)	(571)
Other income, net	415	108
Net loss before tax	(13,563)	(15,736)
Income tax expense	186	124
Net loss	(13,749)	(15,860)
Other comprehensive (loss) income
Currency translation adjustment	(549)	72
Change in unrealized (losses) gains on marketable securities	(128)	173
Total other comprehensive (loss) income	(677)	245
Comprehensive loss	$ (14,426)	$ (15,615)
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (0.36)	$ (0.42)
Net loss per share attributable to common stockholders, diluted (in dollars per share)	$ (0.36)	$ (0.42)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic (in shares)	38,636,029	37,572,382
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted (in shares)	38,636,029	37,572,382

Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Right of use asset	$ 2,705	$ 3,406
Weighted average remaining lease term (years)	1 year 1 month 20 days	1 year 4 months 6 days
Weighted average discount rate	6.70%	6.70%

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023
Pay vs Performance Disclosure
Net loss	$ (13,749)	$ (15,860)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(g)(1)(ii))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481687/323-10-50-3

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 28
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482907/825-10-50-28

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482765/220-10-50-6

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483443/250-10-50-3

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483443/250-10-50-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480175/815-40-65-1

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483443/250-10-50-8

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483443/250-10-50-9

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483443/250-10-50-11

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483443/250-10-50-11

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483443/250-10-50-4

Reference 13: http://www.xbrl.org/2003/role/exampleRef
-Topic 946
-SubTopic 830
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480167/946-830-55-10

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section 45
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483581/946-220-45-7

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(18))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-22

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(9))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-09(1)(d))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483575/946-220-S99-3

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(i))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A

Reference 20: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(ii))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iii)(A))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iv))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(5))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1A

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(i))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B

Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(A))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B

Reference 26: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(B))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B

Reference 27: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iv))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B

Reference 28: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(5))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480097/470-10-S99-1B

Reference 29: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-30

Reference 30: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

Reference 31: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 60B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482689/260-10-45-60B

Reference 32: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 31
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-31

Reference 33: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

Reference 34: http://www.xbrl.org/2003/role/disclosureRef
-Topic 205
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483499/205-20-50-7

Reference 35: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

Reference 36: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482790/220-10-45-1A

Reference 37: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482790/220-10-45-1B

Reference 38: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(20))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2

Reference 39: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(22))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1

+ Details

Commitments and Contingencies - Other Supplemental Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Cash paid for amounts included in the measurement of lease liabilities included in cash flows used in operating activities	$ 910	$ 872
Right-of-use assets obtained in exchange for lease liabilities	$ 0	$ 0

Recent Accounting Pronouncements	3 Months Ended
Recent Accounting Pronouncements	Mar. 31, 2024
Accounting Policies [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements Recent Accounting Pronouncements Not Yet Adopted In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. The amendments in this ASU require disclosures, on an annual and interim basis, of significant segment expenses that are regularly provided to the chief operating decision maker (CODM), as well as the aggregate amount of other segment items included in the reported measure of segment profit or loss. This ASU requires that a public entity disclose the title and position of the CODM and an explanation of how the CODM uses the reported measure(s) of segment profit or loss. Public entities will be required to provide all annual disclosures currently required by Topic 280 in interim periods, and entities with a single reportable segment are required to provide all the disclosures required by the amendments in the update and existing segment disclosures in Topic 280. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. The Company is currently evaluating the impact that this update will have on its disclosures in the consolidated financial statements. In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which improves the transparency of income tax disclosures by requiring consistent categories and greater disaggregation of information in the effective tax rate reconciliation and income taxes paid disaggregated by jurisdiction. It also includes certain other amendments to improve the effectiveness of income tax disclosures. The standard is effective for fiscal years beginning after December 15, 2024, with early adoption permitted. The Company is currently evaluating the disclosure requirements related to the new standard. All other newly issued accounting pronouncements not yet effective have been deemed either immaterial or not applicable.

- Definition

The entire disclosure for change in accounting principle. Includes, but is not limited to, nature, reason, and method of adopting amendment to accounting standards or other change in accounting principle.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480016/944-40-65-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(2)(ii)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480016/944-40-65-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(2)(iii)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480016/944-40-65-2

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(2)(iv)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480016/944-40-65-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (h)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480016/944-40-65-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 11.M.Q2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480530/250-10-S99-5

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483443/250-10-50-1

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 6
-Subparagraph (i)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480528/815-20-65-6

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 5
-Subparagraph (f)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479832/842-10-65-5

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 5
-Subparagraph (f)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479832/842-10-65-5

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480175/815-40-65-2

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480175/815-40-65-2

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (c)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480175/815-40-65-2

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 848
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483550/848-10-65-2

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 105
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 6
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479343/105-10-65-6

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483443/250-10-50-1

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 8
-Subparagraph (e)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482615/740-10-65-8

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 8
-Subparagraph (e)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482615/740-10-65-8

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 8
-Subparagraph (e)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482615/740-10-65-8

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 6
-Subparagraph (e)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482833/825-10-65-6

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 6
-Subparagraph (e)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482833/825-10-65-6

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 6
-Subparagraph (e)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482833/825-10-65-6

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 4
-Subparagraph (e)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479654/326-10-65-4

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 10
-Name Accounting Standards Codification
-Section 65
-Paragraph 4
-Subparagraph (e)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479654/326-10-65-4

Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 926
-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (f)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483194/926-20-65-2

Reference 26: http://www.xbrl.org/2003/role/disclosureRef
-Topic 926
-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (f)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483194/926-20-65-2

Reference 27: http://www.xbrl.org/2003/role/disclosureRef
-Topic 926
-SubTopic 20
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (f)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483194/926-20-65-2

Reference 28: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480530/250-10-S99-6

Reference 29: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483443/250-10-50-1

Reference 30: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483443/250-10-50-1

Reference 31: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Topic 250
-Publisher FASB
-URI https://asc.fasb.org//250/tableOfContent

Reference 32: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 1
-Subparagraph (e)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480175/815-40-65-1

Reference 33: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (d)(1)
-SubTopic 20
-Topic 310
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481925/310-20-65-2

Reference 34: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (d)(2)
-SubTopic 20
-Topic 310
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481925/310-20-65-2

+ Details

Segment Information (Tables)

3 Months Ended

Mar. 31, 2024

Segment Reporting [Abstract]

Schedule of Revenue by Geographic Area

The following table sets forth the Company’s revenue by geographic area (in thousands):


	Three Months Ended March 31,
	2024		2023
United States	$	12,869	$	9,337
Europe, Middle-East and Africa (“EMEA”)	5,116		4,531
Asia Pacific	698		596
Other International	171		71
Total	$	18,854	$	14,535

Schedule of Long-lived Assets by Geographic Area

The following table sets forth the Company’s long-lived assets by geographic area (in thousands):


	March 31,		December 31,
	2024		2023
United States	$	4,124	$	3,962
EMEA	43		54
Asia Pacific	51		12
Total	$	4,218	$	4,028

Segment Information

3 Months Ended

Mar. 31, 2024

Segment Reporting [Abstract]

Segment Information

The chief operating decision maker for the Company is the Chief Executive Officer. The Company’s Chief Executive Officer reviews financial information presented on a consolidated basis, accompanied by information about revenue by geographic region, for purposes of allocating resources and evaluating financial performance. The

Company has one business activity and there are no segment managers who are held accountable for operations, operating results or plans for levels or components below the consolidated unit level. Accordingly, the Company has determined that it has a single reportable and operating segment structure. The Company’s Chief Executive Officer evaluates performance based primarily on revenue in the geographic locations in which the Company operates.

Revenue by geographic area is based on the billing address of the customer. The following table sets forth the Company’s revenue by geographic area (in thousands):


	Three Months Ended March 31,
	2024		2023
United States	$	12,869	$	9,337
Europe, Middle-East and Africa (“EMEA”)	5,116		4,531
Asia Pacific	698		596
Other International	171		71
Total	$	18,854	$	14,535

Long-lived assets by geographic area are based on physical location of those assets. The following table sets forth the Company’s long-lived assets by geographic area (in thousands):


	March 31,		December 31,
	2024		2023
United States	$	4,124	$	3,962
EMEA	43		54
Asia Pacific	51		12
Total	$	4,218	$	4,028

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-22

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-15

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 31
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-31

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-42

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 40
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-40

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//280/tableOfContent

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-26

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 34
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-34

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 41
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-41

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-21

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-21

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

+ Details

Balance Sheet Components - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Prepaid expenses	$ 2,346	$ 1,910
Prepaid insurance	739	906
VAT and other receivable	657	915
Other current assets	77	504
Total prepaid expenses and other current assets	$ 3,819	$ 4,235

Net Loss per Share Attributable to Common Stockholders - Computation of Basic and Diluted Net Loss per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Numerator
Net loss attributable to common stockholders, basic	$ (13,749)	$ (15,860)
Net loss attributable to common stockholders, diluted	$ (13,749)	$ (15,860)
Denominator
Weighted-average common stock outstanding (in shares)	38,636,109	37,630,339
Less: weighted-average common shares subject to repurchase (in shares)	(80)	(57,957)
Weighted-average common shares used to compute, basic net loss per share (in shares)	38,636,029	37,572,382
Weighted-average common shares used to compute, diluted net loss per share (in shares)	38,636,029	37,572,382
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (0.36)	$ (0.42)
Net loss per share attributable to common stockholders, diluted (in dollars per share)	$ (0.36)	$ (0.42)

Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended
Revenue Recognition (Details) - USD ($) $ in Millions	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Deferred revenue	$ 0.1		$ 0.1
Revenue recognized	$ 0.1	$ 0.1

Balance Sheet Components - Capitalized Implementation Costs of a Hosting Arrangement (Details) - Software and Software Development Costs - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Capitalized costs	$ 0.1		$ 0.1
Amortization period	3 years
Amortization expense	$ 0.1	$ 0.1
Prepaid Expenses and Other Current Assets
Property, Plant and Equipment [Line Items]
Capitalized costs	$ 0.1

Fair Value Measurements - Narrative (Details) - USD ($)	3 Months Ended
Fair Value Measurements - Narrative (Details) - USD ($)	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Derivative [Line Items]
Allowance for credit loss	$ 0		$ 0
Impairment losses	0	$ 0
Accrued interest receivable on marketable securities	200,000		400,000
Accrued interest	0	$ 0
Fair Value, Recurring
Derivative [Line Items]
Liabilities measured at fair value on a recurring and non-recurring	0		0
Fair Value, Nonrecurring
Derivative [Line Items]
Liabilities measured at fair value on a recurring and non-recurring	$ 0		$ 0

Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2024

Equity [Abstract]

Schedule of Shares Reserved for Future Issuance

The Company has reserved shares of common stock for future issuances as follows:


	March 31,	December 31,
	2024	2023
Common stock options issued and outstanding	3,626,551	3,142,981
Common stock restricted stock units issued and outstanding	3,270,598	2,244,903
Common stock available for future grants	2,994,699	2,541,438
Common stock available for employee stock purchase plan	1,731,920	1,436,823
Total	11,623,768	9,366,145

Schedule of Summary of Stock Option Activity

A summary of stock option activity for the three months ended March 31, 2024 is set forth below:


	Outstanding Options
	Number of Shares	Weighted Average Exercise Price
Balance, January 1, 2024	3,142,981	$	16.40
Options granted	638,016	9.07
Options exercised	(28,116)	2.02
Options canceled	(126,330)	18.87
Balance, March 31, 2024	3,626,551	$	15.14

Schedule of Options Vested and Expected to Vest


	March 31, 2024
	Number of Shares	Weighted Average Exercise Price		Weighted Average Contractual Life (in Years)
Options vested	1,898,778	$	15.70	6.22
Options vested and expected to vest	3,626,551	$	15.14	7.50

Schedule of Activity with Respect to Restricted Stock Units

Activity with respect to restricted stock units was as follows:


	Number of Shares Underlying Outstanding Restricted Stock	Weighted Average Grant Date Fair Value
Unvested as of January 1, 2024	2,244,903	$	15.74
Granted	1,385,426	9.25
Vested	(177,610)	18.50
Canceled	(182,121)	14.95
Unvested as of March 31, 2024	3,270,598	$	12.89

Schedule of Total Stock-Based Compensation

Stock-based compensation expense is reflected in the statements of operations and comprehensive loss as follows (in thousands):


	Three Months Ended March 31,
	2024		2023
Cost of goods sold	$	381	$	223
Research and development	773		566
Selling, general and administrative	4,519		3,849
Total	$	5,673	$	4,638

The above stock-based compensation expense related to the following equity-based awards (in thousands):


	Three Months Ended March 31,
	2024		2023
Stock options and restricted stock units	$	5,481	$	4,540
Employee stock purchase plan	192		98
Total	$	5,673	$	4,638

- Definition

Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(27))
-SubTopic 10
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-3

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-4

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-5

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481142/505-10-45-2

Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-10

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-8

Reference 11: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section S99
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480244/480-10-S99-1

Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-6

Reference 13: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-7

+ Details

Segment Information - Long-Lived Assets by Geographical Area (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 4,218	$ 4,028
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	4,124	3,962
EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	43	54
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 51	$ 12

Long Term Debt - Contractual Maturities of Financing Obligations (Details) $ in Thousands	Mar. 31, 2024 USD ($)
Long-term Debt, Fiscal Year Maturity [Abstract]
2024 (remaining nine months)	$ 4,785
2025	15,209
2026	14,036
2027	10,816
Total	44,846
Less: unamortized debt discount	(136)
Less: interest	(7,477)
Term loan and credit agreement	$ 37,233

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References + Details

Balance Sheet Components - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 9,410	$ 8,883
Less: accumulated depreciation	(5,192)	(4,855)
Property and equipment, net	4,218	4,028
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	2,305	2,271
Computer equipment and software
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	2,317	1,872
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	263	264
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	2,277	2,277
Construction in progress
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 2,248	$ 2,199

Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2024
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The income tax expense for the three months ended March 31, 2024 and March 31, 2023 was $0.2 million and $0.1 million, respectively. The income tax expense was determined based upon estimates of the Company’s effective income tax rates in various jurisdictions. The difference between the Company’s effective income tax rate and the U.S. federal statutory rate is primarily attributable to state income taxes, foreign income taxes, and non-recognition of US tax benefit because of a full valuation allowance against US deferred tax assets. The income tax expense for the three months ended March 31, 2024 and March 31, 2023 relates primarily to state minimum income tax and income tax on the Company’s earnings in foreign jurisdictions.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480990/946-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//740/tableOfContent

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482685/740-10-50-14

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482685/740-10-50-21

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 270
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482526/740-270-50-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 17
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482685/740-10-50-17

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I.5.Q1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479360/740-10-S99-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479360/740-10-S99-2

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482603/740-30-50-2

+ Details

Fair Value Measurements - Contractual Maturities of the Company’s Marketable Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Amortized cost, due within one year	$ 46,024
Amortized cost, due in one year to five years	4,287
Amortized Cost	50,311	$ 47,861
Fair value, due within one year	45,973
Fair value, due in one year to five years	4,293
Fair Value	$ 50,266	$ 47,945

Stockholders' Equity - Options Vested and Expected to Vest (Details)	3 Months Ended
	Mar. 31, 2024 $ / shares shares
Number of Shares
Options vested (in shares) \| shares	1,898,778
Options vested and expected to vest (in shares) \| shares	3,626,551
Weighted Average Exercise Price
Options vested (in dollars per share) \| $ / shares	$ 15.70
Options vested and expected to vest (in dollars per share) \| $ / shares	$ 15.14
Weighted Average Contractual Life (in Years)
Options vested	6 years 2 months 19 days
Options vested and expected to vest	7 years 6 months

Balance Sheet Components (Tables)

3 Months Ended

Mar. 31, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Cash and Cash Equivalents

The Company’s cash and cash equivalents consist of the following (in thousands):


	March 31,		December 31,
	2024		2023
Cash	$	57,868	$	58,418
Cash equivalents:
Money market funds	5,312		25,129
U.S. Government agency bonds	3,995		—
Commercial paper	2,983		—
Total cash and cash equivalents	$	70,158	$	83,547

Schedule of Inventory

Inventory consists of the following (in thousands):


	March 31,		December 31,
	2024		2023
Raw materials	$	3,062	$	2,924
Work in process	440		427
Finished goods	16,248		15,972
Total inventory	$	19,750	$	19,323
Reported as:
Inventory	$	17,228	$	16,743
Long-term inventory	2,522		2,580
Total inventory	$	19,750	$	19,323

Schedule of Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consist of the following (in thousands):


	March 31,		December 31,
	2024		2023
Prepaid expenses	$	2,346	$	1,910
Prepaid insurance	739		906
VAT and other receivable	657		915
Other current assets	77		504
Total prepaid expenses and other current assets	$	3,819	$	4,235

Schedule of Property and Equipment, Net

Property and equipment, net consist of the following (in thousands):


	March 31,		December 31,
	2024		2023
Machinery and equipment	$	2,305	$	2,271
Computer equipment and software	2,317		1,872
Furniture and fixtures	263		264
Leasehold improvements	2,277		2,277
Construction in progress	2,248		2,199
Total	9,410		8,883
Less: accumulated depreciation	(5,192)		(4,855)
Property and equipment, net	$	4,218	$	4,028

Schedule Intangible Assets

Intangible assets consist of the following (in thousands):


	March 31, 2024
	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Developed technology	$	1,658	$	(1,658)	$	—
Trademarks	191		(191)		—
Total intangible assets	$	1,849	$	(1,849)	$	—


	December 31, 2023
	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Developed technology	$	1,658	$	(1,630)	$	28
Trademarks	191		(188)		3
Total intangible assets	$	1,849	$	(1,818)	$	31

Schedule of Accrued Liabilities

Accrued liabilities consist of the following (in thousands):


	March 31,		December 31,
	2024		2023
Accrued employee bonuses and commissions	$	2,903	$	7,875
Accrued vacation	2,600		2,400
Other accrued personnel related expenses	2,111		2,859
Accrued professional fees	1,439		1,705
Sales taxes, franchise tax and VAT	648		763
Accrued inventory purchases	124		170
Other	246		462
Total accrued liabilities	$	10,071	$	16,234

Balance Sheet Components - Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 1,849	$ 1,849
Accumulated Amortization	(1,849)	(1,818)
Net Carrying Value	0	31
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	1,658	1,658
Accumulated Amortization	(1,658)	(1,630)
Net Carrying Value	0	28
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	191	191
Accumulated Amortization	(191)	(188)
Net Carrying Value	$ 0	$ 3

Balance Sheet Components - Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash	$ 57,868	$ 58,418
Cash equivalents:
Money market funds	5,312	25,129
U.S. Government agency bonds	3,995	0
Commercial paper	2,983	0
Total cash and cash equivalents	$ 70,158	$ 83,547	$ 110,407

- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References + Details

Summary of Significant Accounting Policies	3 Months Ended
Summary of Significant Accounting Policies	Mar. 31, 2024
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation The Company’s unaudited interim condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”). Any reference in these notes to applicable guidance is meant to refer to the authoritative United States generally accepted accounting principles as found in the Accounting Standards Codification (“ASC”) and Accounting Standards Updates (“ASU”) of the Financial Accounting Standards Board (“FASB”). Principles of Consolidation The unaudited interim condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. Unaudited Interim Financial Information The condensed consolidated balance sheet as of December 31, 2023 was derived from the Company’s audited financial statements, but does not include all disclosures required by U.S. GAAP. The accompanying unaudited interim condensed consolidated financial statements as of March 31, 2024 and for the three months ended March 31, 2024 and March 31, 2023, have been prepared by the Company, pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”), for interim financial statements. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. However, the Company believes that the disclosures are adequate to make the information presented not misleading. Accordingly, these financial statements should be read in conjunction with the audited financial statements as of and for the fiscal year ended December 31, 2023 and notes thereto, included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2023 filed with the SEC on February 27, 2024. In the opinion of management, all adjustments, consisting only of normal recurring adjustments necessary for a fair statement of the Company’s condensed consolidated financial position as of March 31, 2024 and condensed consolidated results of operations and condensed consolidated cash flows for the three months ended March 31, 2024 and March 31, 2023 have been made. The results of operations for the three months ended March 31, 2024 are not necessarily indicative of the results of operations that may be expected for the fiscal year ending December 31, 2024. Use of Estimates The preparation of unaudited interim condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the unaudited interim condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods. Although these estimates are based on the Company’s knowledge of current events and actions it may undertake in the future, actual results may ultimately materially differ from these estimates and assumptions. Significant estimates and assumptions include reserves and write-downs related to inventories, classification of short-term and long-term inventories, the recoverability of long-term assets, stock-based compensation, intangible assets, goodwill, deferred tax assets and related valuation allowances and impact of contingencies. Fair Value of Financial Instruments The carrying amounts of the Company’s financial instruments consisting of cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities approximate fair value due to their relatively short maturities. Based on the borrowing rates currently available to the Company for debt with similar terms and consideration of default and credit risk, the carrying value of the term loan approximates their fair value. The fair value of marketable debt securities is estimated using Level 1 and Level 2 inputs (Note 4). Concentration of Credit Risk Financial instruments that potentially subject the Company to concentrations of risk consist principally of cash, cash equivalents and accounts receivable. The Company maintains its cash and cash equivalents balances with established financial institutions and, at times, such balances with any one financial institution may be in excess of the Federal Deposit Insurance Corporation (“FDIC”) insured limits. As of March 31, 2024 and December 31, 2023, the Company also had cash on deposit with foreign banks of approximately $4.3 million and $4.7 million, respectively, that was not federally insured. The Company earns revenue primarily from the sale of its products to hospitals and other customers such as distributors. Sales of Zephyr Valves and delivery catheters accounted for most of the Company’s revenue for the three months ended March 31, 2024 and March 31, 2023. The Company’s accounts receivable are derived from revenue earned from customers. The Company performs ongoing credit evaluations of its customers’ financial condition and generally requires no collateral from its customers. As of March 31, 2024 and December 31, 2023, no customer accounted for more than 10% of accounts receivable. For the three months ended March 31, 2024 and March 31, 2023, no customer accounted for more than 10% of revenue. The Company relies on single source suppliers for the components, sub-assemblies and materials for its products. These components, sub-assemblies and materials are critical and there are no or relatively few alternative sources of supply. The Company’s suppliers have generally met the Company’s demand for their products and services on a timely basis in the past. Foreign Currency Translation and Transaction Gains and Losses The functional currencies of the Company’s wholly owned subsidiaries in Switzerland, Germany, Australia, the United Kingdom, France and Hong Kong are the Swiss franc. The functional currency of the Company’s subsidiaries in Italy and Japan is the Euro and Yen, respectively. Accordingly, asset and liability accounts of Switzerland, France, Germany, Australia, the United Kingdom, Italy, Hong Kong and Japan operations are translated into U.S. dollars using the current exchange rate in effect at the balance sheet date and equity accounts are translated into U.S. dollars using historical rates. The revenues and expenses are translated using the average exchange rates in effect during the period, and gains and losses from foreign currency translation adjustments are included as a component of accumulated other comprehensive income in the condensed consolidated balance sheet. Foreign currency translation adjustments are recorded in other comprehensive (loss) income in the condensed consolidated statements of operations and comprehensive loss and was $(0.5) million and $0.1 million during the three months ended March 31, 2024 and March 31, 2023, respectively. Foreign currency transaction gains and losses are included in other income, net in the condensed consolidated statements of operations and comprehensive loss and was $0.4 million and less than $0.1 million during the three months ended March 31, 2024 and March 31, 2023, respectively. Credit Losses—Accounts Receivable Accounts receivable are recorded at the amounts billed less estimated allowances for credit losses for any potential uncollectible amounts. The Company continually monitors customer payments and maintains an allowance for estimated losses resulting from a customer’s inability to make required payments. The Company considers factors such as historical experience, credit quality, age of the accounts receivable balances, geographic related risks and economic conditions that may affect a customer’s ability to pay. Accounts receivable are written-off and charged against an allowance for credit losses when the Company has exhausted collection efforts without success. Accounts receivable is presented net of an allowance for credit losses of $0 as of both March 31, 2024 and December 31, 2023. Net Loss per Share Attributable to Common Stockholders Basic net loss per common share is calculated by dividing the net loss attributable to common stockholders by the weighted-average number of common stock outstanding during the period, without consideration of potentially dilutive securities. Diluted net loss per share is computed by dividing the net loss attributable to common stockholders by the weighted-average number of common stock and potentially dilutive securities outstanding for the period. For purposes of the diluted net loss per share calculation, stock options and common stock subject to repurchase related to early exercise of stock options are considered to be potentially dilutive securities. Basic and diluted net loss attributable to common stockholders per share is presented in conformity with the two-class method required for participating securities. The Company considers the shares issued upon the early exercise of stock options subject to repurchase to be participating securities, because holders of such shares have non-forfeitable dividend rights in the event a dividend is paid on common stock. The holders of the shares issued upon early exercise of stock options subject to repurchase do not have a contractual obligation to share in the Company’s losses. As such, the net loss was attributed entirely to common stockholders. Because the Company has reported a net loss for all periods presented, diluted net loss per common share is the same as basic net loss per common share for those periods

Net Loss per Share Attributable to Common Stockholders - Excluded Potentially Dilutive Securities Outstanding (Details) - shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from computation of diluted weighted average shares outstanding (in shares)	6,914,733	6,041,923
Options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from computation of diluted weighted average shares outstanding (in shares)	3,626,551	3,278,913
Unvested restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from computation of diluted weighted average shares outstanding (in shares)	3,270,598	2,696,843
Unvested early exercised common stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from computation of diluted weighted average shares outstanding (in shares)	56	46,012
Shares committed under employee stock purchase plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded from computation of diluted weighted average shares outstanding (in shares)	17,528	20,155

Segment Information - Revenue by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 18,854	$ 14,535
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	12,869	9,337
Europe, Middle-East and Africa (“EMEA”)
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	5,116	4,531
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	698	596
Other International
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 171	$ 71

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 924
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479941/924-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-5

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-30

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-42

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-22

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 40
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-40

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-22

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 41
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-41

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-4

+ Details

Commitments and Contingencies - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Operating lease cost	$ 722	$ 721
Short-term lease cost	9	8
Variable lease cost	289	154
Total lease cost	$ 1,020	$ 883

Stockholders' Equity - Shares Reserved for Future Issuance (Details) - shares	Mar. 31, 2024	Dec. 31, 2023
Class of Stock [Line Items]
Shares reserved for future issuance (in shares)	11,623,768	9,366,145
Common stock options issued and outstanding
Class of Stock [Line Items]
Shares reserved for future issuance (in shares)	3,626,551	3,142,981
Common stock restricted stock units issued and outstanding
Class of Stock [Line Items]
Shares reserved for future issuance (in shares)	3,270,598	2,244,903
Common stock available for future grants
Class of Stock [Line Items]
Shares reserved for future issuance (in shares)	2,994,699	2,541,438
Common stock available for employee stock purchase plan
Class of Stock [Line Items]
Shares reserved for future issuance (in shares)	1,731,920	1,436,823

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-13

Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 272
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483014/272-10-45-3

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 272
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482987/272-10-50-1

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(d))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-13

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-13

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-13

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-13

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-14

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-18

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(27)(b))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-2

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(i)(2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(i)(1))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(i)(2)(i))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-03(i)(2)(ii))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3

+ Details

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities
Net loss	$ (13,749)	$ (15,860)
Adjustments to reconcile net loss to net cash used in operating activities
Stock-based compensation expense	5,673	4,638
Loss on disposal of fixed assets	0	1
Inventory write-downs	163	273
Depreciation and amortization expense	423	437
Amortization of debt discount and debt issuance costs	16	10
Net accretion of discounts on marketable securities	(393)	(203)
Non-cash lease expense	701	654
Net changes in operating assets and liabilities:
Accounts receivable	1,363	531
Inventory	(1,084)	(604)
Prepaid expenses and other current assets	266	(168)
Other assets	26	(5)
Accounts payable	1,635	868
Accrued liabilities	(5,981)	(2,478)
Income taxes payable	(22)	40
Lease liabilities	(840)	(765)
Deferred revenue	8	(13)
Net cash used in operating activities	(11,795)	(12,644)
Cash flows from investing activities
Purchases of investments	(13,806)	(13,115)
Maturities of investments	11,750	13,750
Purchases of property and equipment	(451)	(61)
Net cash (used in) provided by investing activities	(2,507)	574
Cash flows from financing activities
Proceeds from borrowing under term loan	0	20,000
Proceeds from exercise of common stock options	56	44
Proceeds from issuance of common stock under the employee stock purchase plan	808	676
Net cash provided by financing activities	864	20,720
Effect of exchange rate changes on cash and cash equivalents	48	21
Net (decrease) increase in cash, cash equivalents, and restricted cash	(13,390)	8,671
Cash, cash equivalents, and restricted cash at beginning of the period	83,784	101,967
Cash, cash equivalents, and restricted cash at end of year	70,394	110,638
Reconciliation of cash, cash equivalents, and restricted cash to consolidated balance sheets:
Cash and cash equivalents	70,158	110,407
Restricted cash	236	231
Cash, cash equivalents, and restricted cash in consolidated balance sheets	70,394	110,638
Supplemental non-cash items:
Lapse in repurchase rights of common stock	0	56
Purchases of property and equipment in accounts payable and accrued liabilities	100	469
Amount receivable from exercise of common stock options	1	2
Supplemental disclosure of cash flow information:
Cash paid for income taxes	170	92
Cash paid for interest	$ 875	$ 356

Commitments and Contingencies - Leases, Narrative (Details) $ in Millions	1 Months Ended				12 Months Ended
	Apr. 30, 2023 USD ($)	Sep. 30, 2020 USD ($)	Aug. 31, 2020 USD ($)	Apr. 30, 2020 USD ($)	Dec. 31, 2013	Mar. 31, 2024 lease
Lessee, Lease, Description [Line Items]
Lease renewal term			5 years
Monthly base rent			$ 0.1
Annual increase rate			3.50%
Option to terminate, notice period					12 months
Sublease term		4 years		3 years
Sublease, option to terminate, notice period				180 days
Sublease, period for option to terminate				18 months
Sublease monthly rent		$ 0.1		$ 0.1
Sublease, expense, annual increase rate		3.50%		3.50%
Sublease, tenant improvement allowance, receivable upon lease renewal		$ 0.7
Sublease renewal term		12 months
Extended term	4 months
Right-of-use asset obtained in exchange for finance lease liability	$ 0.2
Number of vehicle leases \| lease						14
Office Facilities
Lessee, Lease, Description [Line Items]
Lease term					5 years
Vehicles
Lessee, Lease, Description [Line Items]
Lease term						3 years

Long Term Debt (Tables)

3 Months Ended

Mar. 31, 2024

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

The CIBC Loan consists of the following (in thousands):


	March 31,		December 31,
	2024		2023
Term loan	$	37,000	$	37,000
Less: debt issuance costs	(136)		(152)
Term loan	$	36,864	$	36,848
Reported as:
Short-term debt	$	5,139	$	2,056
Long-term debt	31,725		34,792
Total term loan	$	36,864	$	36,848

Schedule of Contractual Maturities of Financing Obligations

As of March 31, 2024, the aggregate future payments under the CIBC Loan and Credit Agreement (including interest payments) are as follows (in thousands):


Fiscal Year Ending December 31,	Amount
2024 (remaining nine months)	$	4,785
2025	15,209
2026	14,036
2027	10,816
Total	44,846
Less: unamortized debt discount	(136)
Less: interest	(7,477)
Term loan and credit agreement	$	37,233

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481568/470-20-55-69B

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69E
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481568/470-20-55-69E

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-3

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482925/835-30-45-2

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482925/835-30-45-1A

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-3

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482949/835-30-55-8

Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480848/942-470-50-3

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-8

Reference 11: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-6

Reference 12: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-7

+ Details

Stockholders' Equity - Stock Option Activity (Details)	3 Months Ended
Stockholders' Equity - Stock Option Activity (Details)	Mar. 31, 2024 $ / shares shares
Number of Shares
Balance, beginning of period (in shares) \| shares	3,142,981
Options granted (in shares) \| shares	638,016
Options exercised (in shares) \| shares	(28,116)
Options canceled (in shares) \| shares	(126,330)
Balance, end of period (in shares) \| shares	3,626,551
Weighted Average Exercise Price
Balance, beginning of period (in dollars per share) \| $ / shares	$ 16.40
Options granted (in dollars per share) \| $ / shares	9.07
Options exercised (in dollars per share) \| $ / shares	2.02
Options canceled (in dollars per share) \| $ / shares	18.87
Balance, end of period (in dollars per share) \| $ / shares	$ 15.14

Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2022		37,555,565
Beginning balance at Dec. 31, 2022	$ 154,007	$ 38	$ 502,712	$ 1,575	$ (350,318)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon vesting of restricted stock units (in shares)		66,895
Issuance of common stock upon exercise of stock options (in shares)		23,006
Issuance of common stock upon exercise of stock options	46		46
Issuance of shares pursuant to Employee Stock Purchase Plan (in shares)		85,210
Issuance of shares pursuant to employee stock purchase plan	676		676
Change in shares subject to repurchase	56		56
Stock-based compensation expense	4,764		4,764
Currency translation adjustment	72			72
Change in unrealized (losses) gains on marketable securities	173			173
Net loss	(15,860)				(15,860)
Ending balance (in shares) at Mar. 31, 2023		37,730,676
Ending balance at Mar. 31, 2023	$ 143,934	$ 38	508,254	1,820	(366,178)
Beginning balance (in shares) at Dec. 31, 2023	38,516,383	38,516,383
Beginning balance at Dec. 31, 2023	$ 118,315	$ 39	526,797	2,640	(411,161)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon vesting of restricted stock units (in shares)		177,610
Issuance of common stock upon exercise of stock options (in shares)	28,116	28,116
Issuance of common stock upon exercise of stock options	$ 57		57
Issuance of shares pursuant to Employee Stock Purchase Plan (in shares)		90,066
Issuance of shares pursuant to employee stock purchase plan	808		808
Stock-based compensation expense	5,744		5,744
Currency translation adjustment	(549)			(549)
Change in unrealized (losses) gains on marketable securities	(128)			(128)
Net loss	$ (13,749)				(13,749)
Ending balance (in shares) at Mar. 31, 2024	38,812,175	38,812,175
Ending balance at Mar. 31, 2024	$ 110,498	$ 39	$ 533,406	$ 1,963	$ (424,910)

Balance Sheet Components - Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued employee bonuses and commissions	$ 2,903	$ 7,875
Accrued vacation	2,600	2,400
Other accrued personnel related expenses	2,111	2,859
Accrued professional fees	1,439	1,705
Sales taxes, franchise tax and VAT	648	763
Accrued inventory purchases	124	170
Other	246	462
Total accrued liabilities	$ 10,071	$ 16,234

Balance Sheet Components

3 Months Ended

Mar. 31, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Balance Sheet Components

Cash and Cash Equivalents

The Company’s cash and cash equivalents consist of the following (in thousands):


	March 31,		December 31,
	2024		2023
Cash	$	57,868	$	58,418
Cash equivalents:
Money market funds	5,312		25,129
U.S. Government agency bonds	3,995		—
Commercial paper	2,983		—
Total cash and cash equivalents	$	70,158	$	83,547

Inventory

Inventory consists of the following (in thousands):


	March 31,		December 31,
	2024		2023
Raw materials	$	3,062	$	2,924
Work in process	440		427
Finished goods	16,248		15,972
Total inventory	$	19,750	$	19,323
Reported as:
Inventory	$	17,228	$	16,743
Long-term inventory	2,522		2,580
Total inventory	$	19,750	$	19,323

Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consist of the following (in thousands):


	March 31,		December 31,
	2024		2023
Prepaid expenses	$	2,346	$	1,910
Prepaid insurance	739		906
VAT and other receivable	657		915
Other current assets	77		504
Total prepaid expenses and other current assets	$	3,819	$	4,235

Capitalized Implementation Costs of a Hosting Arrangement

The Company has several software systems that are cloud-based hosting arrangements with service contracts. The Company accounts for costs incurred in connection with the implementation of these various software systems under ASU 2018-15, Intangibles—Goodwill and Other—Internal Use Software (Subtopic 350–40): Customer’s

Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract. The Company expenses all costs (internal and external) that are incurred in the planning and post-implementation operation stages. As of March 31, 2024 and December 31, 2023, the Company has capitalized approximately $0.1 million and $0.1 million in implementation costs, net of amortization, respectively. The capitalized costs are amortized on a straight-line basis over the non-cancelable contract terms, which are generally three years. As of March 31, 2024, the capitalized costs of $0.1 million were included in prepaid expenses and other current assets. Amortization expense, which was included in selling, general and administrative expenses, was $0.1 million and $0.1 million for the three months ended March 31, 2024 and March 31, 2023, respectively.

Property and Equipment, Net

Property and equipment, net consist of the following (in thousands):


	March 31,		December 31,
	2024		2023
Machinery and equipment	$	2,305	$	2,271
Computer equipment and software	2,317		1,872
Furniture and fixtures	263		264
Leasehold improvements	2,277		2,277
Construction in progress	2,248		2,199
Total	9,410		8,883
Less: accumulated depreciation	(5,192)		(4,855)
Property and equipment, net	$	4,218	$	4,028

Depreciation expense was $0.3 million for each of the three months ended March 31, 2024 and March 31, 2023.

Goodwill

Goodwill was $2.3 million as of March 31, 2024 and December 31, 2023. There were no acquisitions or dispositions of goodwill in the three months ended March 31, 2024 and March 31, 2023. The Company assesses goodwill for impairment annually, or more frequently, when events or changes in circumstances indicate there may be impairment. Through March 31, 2024, there have been no events or changes in circumstances that indicated that the carrying value of goodwill may not be recoverable. As a result, no impairment charge was recorded during the three months ended March 31, 2024.

Intangible Assets

Intangible assets consist of the following (in thousands):


	March 31, 2024
	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Developed technology	$	1,658	$	(1,658)	$	—
Trademarks	191		(191)		—
Total intangible assets	$	1,849	$	(1,849)	$	—


	December 31, 2023
	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Developed technology	$	1,658	$	(1,630)	$	28
Trademarks	191		(188)		3
Total intangible assets	$	1,849	$	(1,818)	$	31

Amortization expense relating to the intangibles totaled less than $0.1 million during each of the three months ended March 31, 2024 and March 31, 2023, respectively. The intangible assets were fully amortized as of March 31, 2024.

Accrued Liabilities

Accrued liabilities consist of the following (in thousands):


	March 31,		December 31,
	2024		2023
Accrued employee bonuses and commissions	$	2,903	$	7,875
Accrued vacation	2,600		2,400
Other accrued personnel related expenses	2,111		2,859
Accrued professional fees	1,439		1,705
Sales taxes, franchise tax and VAT	648		763
Accrued inventory purchases	124		170
Other	246		462
Total accrued liabilities	$	10,071	$	16,234

Stockholders' Equity

3 Months Ended

Mar. 31, 2024

Equity [Abstract]

Stockholders' Equity

Stockholders’ Equity

Common Stock

As of March 31, 2024 and December 31, 2023, the Company’s certificate of incorporation authorized the Company to issue up to 200,000,000 shares of common stock. Common stockholders are entitled to dividends as and when declared by the Company’s Board of Directors, subject to the rights of holders of all classes of stock outstanding having priority rights as to dividends. There have been no dividends declared to date. The holder of each share of common stock is entitled to one vote.

In March 2024, the Company granted stock-based awards outside of the existing stock plans to the Company’s new Chief Executive Officer. These awards were granted as a material inducement for accepting employment with the Company, in accordance with Nasdaq Listing Rule 5635(c)(4). The inducement awards consisted of a total of 630,402 shares of the Company’s common stock, which includes 205,286 shares of common stock issuable upon the vesting of a restricted stock unit award and 425,116 shares of common stock issuable upon the exercise of a nonqualified stock option grant generally subject to the same terms and conditions as grants that are made under the 2020 Equity Incentive Plan.

Shares Reserved for Future Issuance

The Company has reserved shares of common stock for future issuances as follows:


	March 31,	December 31,
	2024	2023
Common stock options issued and outstanding	3,626,551	3,142,981
Common stock restricted stock units issued and outstanding	3,270,598	2,244,903
Common stock available for future grants	2,994,699	2,541,438
Common stock available for employee stock purchase plan	1,731,920	1,436,823
Total	11,623,768	9,366,145

Stock Option Plan

A summary of stock option activity for the three months ended March 31, 2024 is set forth below:


	Outstanding Options
	Number of Shares	Weighted Average Exercise Price
Balance, January 1, 2024	3,142,981	$	16.40
Options granted	638,016	9.07
Options exercised	(28,116)	2.02
Options canceled	(126,330)	18.87
Balance, March 31, 2024	3,626,551	$	15.14

The aggregate intrinsic value of options outstanding as of March 31, 2024 was $6.6 million.


	March 31, 2024
	Number of Shares	Weighted Average Exercise Price		Weighted Average Contractual Life (in Years)
Options vested	1,898,778	$	15.70	6.22
Options vested and expected to vest	3,626,551	$	15.14	7.50

Total aggregate intrinsic value of options exercisable as of March 31, 2024 was $5.8 million.

Restricted Stock Units

Activity with respect to restricted stock units was as follows:


	Number of Shares Underlying Outstanding Restricted Stock	Weighted Average Grant Date Fair Value
Unvested as of January 1, 2024	2,244,903	$	15.74
Granted	1,385,426	9.25
Vested	(177,610)	18.50
Canceled	(182,121)	14.95
Unvested as of March 31, 2024	3,270,598	$	12.89

The aggregate intrinsic value of restricted stock units outstanding as of March 31, 2024 was $30.3 million.

The fair value as of the respective vesting dates of restricted stock units that vested during the three months ended March 31, 2024 and March 31, 2023 was $1.6 million and $0.8 million, respectively.

Total Stock-Based Compensation

Stock-based compensation expense is reflected in the statements of operations and comprehensive loss as follows (in thousands):


	Three Months Ended March 31,
	2024		2023
Cost of goods sold	$	381	$	223
Research and development	773		566
Selling, general and administrative	4,519		3,849
Total	$	5,673	$	4,638

The above stock-based compensation expense related to the following equity-based awards (in thousands):


	Three Months Ended March 31,
	2024		2023
Stock options and restricted stock units	$	5,481	$	4,540
Employee stock purchase plan	192		98
Total	$	5,673	$	4,638

Stock-based compensation of $0.4 million and $0.3 million was capitalized into inventory for the three months ended March 31, 2024 and March 31, 2023, respectively. Stock-based compensation capitalized in prior periods of $0.4 million and $0.2 million was recognized as cost of sales in the three months ended March 31, 2024 and March 31, 2023, respectively.

As of March 31, 2024, there was $53.8 million of unrecognized compensation costs related to unvested common stock options and restricted stock units, expected to be recognized over a weighted-average period of 2.8 years.

As of March 31, 2024, the Company had unrecognized stock-based compensation relating to the employee stock purchase plan of approximately $0.2 million, which is expected to be recognized over a weighted-average period of 0.4 years.

Stock Modification

In February 2024, the Company’s former Chief Executive Officer, Glendon E. French, resigned as President and Chief Executive Officer, effective as of March 15, 2024. Following this date, Mr. French will continue as a full-time employee of the Company in the capacity of Senior Advisor to the new President and Chief Executive Officer until May 1, 2024, when his employment will cease. Thereafter, Mr. French will continue to serve as a member of the Company’s board of directors, and his outstanding equity awards will continue to vest in accordance with their terms, subject to his continued service to the Company as a member of the board of directors.

The Company evaluated the change in status in accordance with ASC 718 and determined that there was a modification to the unvested awards expected to vest after March 15, 2024. The total stock-based compensation expense related to the modification, evaluated as of the modification date, was $6.3 million, to be recognized over the remaining vesting periods. The Company recorded $0.3 million in stock-based compensation expenses related to the modification for the three months ended March 31, 2024.

- Definition

The entire disclosure for equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-13

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-14

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481062/946-235-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 235
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481062/946-235-50-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 505
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481004/946-505-50-6

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480237/815-40-50-6

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(e)(1))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//505/tableOfContent

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-13

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-13

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-13

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-14

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-14

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-16

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-18

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-18

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-18

+ Details

Long Term Debt - CIBC Loan Components Of Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Term loan	$ 44,846
Less: debt issuance costs	(136)
Term loan and credit agreement	37,233
Long-term debt	32,002	$ 35,089
CIBC Agreement \| Medium-term Notes
Debt Instrument [Line Items]
Term loan	37,000	37,000
Less: debt issuance costs	(136)	(152)
Term loan and credit agreement	36,864	36,848
Short-term debt	5,139	2,056
Long-term debt	$ 31,725	$ 34,792

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482900/835-30-50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(f))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-3

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481568/470-20-55-69B

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69C
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481568/470-20-55-69C

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69E
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481568/470-20-55-69E

Reference 8: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69F
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481568/470-20-55-69F

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 11: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1D
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1D
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1D
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1E
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1E

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1E
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1E

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1E
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1E

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1F
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1F
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1F
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1F
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F

Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1I
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1I

+ Details

- Definition

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References + Details

Long Term Debt - Credit Agreement Narrative (Details) - Pulmonx International Sarl - Line of Credit $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)	Apr. 01, 2023	Mar. 31, 2022 installment	May 31, 2020 USD ($)	May 31, 2020 CHF (SFr)
Debt Instrument [Line Items]
Repayments of debt \| $	$ 0.2
COVID-19 Credit Agreement
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 0.5	SFr 500,000
Stated interest rate		1.50%
Number of installments \| installment			12

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
Income Taxes (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Income tax expense	$ 186	$ 124

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details

Net Loss per Share Attributable to Common Stockholders (Tables)

3 Months Ended

Mar. 31, 2024

Earnings Per Share [Abstract]

Schedule of Basic and Diluted Net Loss per Share

The following table sets forth the computation of basic and diluted net loss per share attributable to common stockholders which excludes shares which are legally outstanding, but subject to repurchase by the Company (in thousands, except share and per share amounts):


	Three Months Ended March 31,
	2024		2023
Numerator
Net loss attributable to common stockholders	$	(13,749)	$	(15,860)
Denominator
Weighted-average common stock outstanding	38,636,109		37,630,339
Less: weighted-average common shares subject to repurchase	(80)		(57,957)
Weighted-average common shares used to compute basic and diluted net loss per share	38,636,029		37,572,382
Net loss per share attributable to common stockholders, basic and diluted	$	(0.36)	$	(0.42)

Schedule of Potentially Dilutive Securities Outstanding

The following potentially dilutive securities outstanding have been excluded from the computation of diluted weighted average shares outstanding because such securities have an antidilutive impact due to the Company’s net loss, in common stock equivalent shares:


	As of March 31,
	2024	2023
Options to purchase common stock	3,626,551	3,278,913
Unvested restricted stock units	3,270,598	2,696,843
Unvested early exercised common stock options	56	46,012
Shares committed under employee stock purchase plan	17,528	20,155
Total	6,914,733	6,041,923

Commitments and Contingencies - Maturity Analysis of Lease Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2024 (remaining nine months)	$ 2,309
2025	1,098
2026	31
Total minimum lease payments	3,438
Less: Amount of lease payments representing interest	98
Present value of future minimum lease payments	3,340
Less: Current lease liabilities	2,690	$ 3,074
Long-term lease liabilities	$ 650	$ 1,106

Summary of Significant Accounting Policies (Policies)	3 Months Ended
Summary of Significant Accounting Policies (Policies)	Mar. 31, 2024
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The Company’s unaudited interim condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”). Any reference in these notes to applicable guidance is meant to refer to the authoritative United States generally accepted accounting principles as found in the Accounting Standards Codification (“ASC”) and Accounting Standards Updates (“ASU”) of the Financial Accounting Standards Board (“FASB”).
Principles of Consolidation	Principles of Consolidation The unaudited interim condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.
Use of Estimates	Use of Estimates The preparation of unaudited interim condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the unaudited interim condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods. Although these estimates are based on the Company’s knowledge of current events and actions it may undertake in the future, actual results may ultimately materially differ from these estimates and assumptions. Significant estimates and assumptions include reserves and write-downs related to inventories, classification of short-term and long-term inventories, the recoverability of long-term assets, stock-based compensation, intangible assets, goodwill, deferred tax assets and related valuation allowances and impact of contingencies.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The carrying amounts of the Company’s financial instruments consisting of cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities approximate fair value due to their relatively short maturities. Based on the borrowing rates currently available to the Company for debt with similar terms and consideration of default and credit risk, the carrying value of the term loan approximates their fair value. The fair value of marketable debt securities is estimated using Level 1 and Level 2 inputs (Note 4).
Concentration of Credit Risk	Concentration of Credit Risk Financial instruments that potentially subject the Company to concentrations of risk consist principally of cash, cash equivalents and accounts receivable. The Company maintains its cash and cash equivalents balances with established financial institutions and, at times, such balances with any one financial institution may be in excess of the Federal Deposit Insurance Corporation (“FDIC”) insured limits.
Foreign Currency Translation and Transaction Gains and Losses	Foreign Currency Translation and Transaction Gains and Losses The functional currencies of the Company’s wholly owned subsidiaries in Switzerland, Germany, Australia, the United Kingdom, France and Hong Kong are the Swiss franc. The functional currency of the Company’s subsidiaries in Italy and Japan is the Euro and Yen, respectively. Accordingly, asset and liability accounts of Switzerland, France, Germany, Australia, the United Kingdom, Italy, Hong Kong and Japan operations are translated into U.S. dollars using the current exchange rate in effect at the balance sheet date and equity accounts are translated into U.S. dollars using historical rates. The revenues and expenses are translated using the average exchange rates in effect during the period, and gains and losses from foreign currency translation adjustments are included as a component of accumulated other comprehensive income in the condensed consolidated balance sheet.
Credit Losses—Accounts Receivable	Credit Losses—Accounts Receivable Accounts receivable are recorded at the amounts billed less estimated allowances for credit losses for any potential uncollectible amounts. The Company continually monitors customer payments and maintains an allowance for estimated losses resulting from a customer’s inability to make required payments. The Company considers factors such as historical experience, credit quality, age of the accounts receivable balances, geographic related risks and economic conditions that may affect a customer’s ability to pay. Accounts receivable are written-off and charged against an allowance for credit losses when the Company has exhausted collection efforts without success.
Net Loss per Share Attributable to Common Stockholders	Net Loss per Share Attributable to Common Stockholders Basic net loss per common share is calculated by dividing the net loss attributable to common stockholders by the weighted-average number of common stock outstanding during the period, without consideration of potentially dilutive securities. Diluted net loss per share is computed by dividing the net loss attributable to common stockholders by the weighted-average number of common stock and potentially dilutive securities outstanding for the period. For purposes of the diluted net loss per share calculation, stock options and common stock subject to repurchase related to early exercise of stock options are considered to be potentially dilutive securities. Basic and diluted net loss attributable to common stockholders per share is presented in conformity with the two-class method required for participating securities. The Company considers the shares issued upon the early exercise of stock options subject to repurchase to be participating securities, because holders of such shares have non-forfeitable dividend rights in the event a dividend is paid on common stock. The holders of the shares issued upon early exercise of stock options subject to repurchase do not have a contractual obligation to share in the Company’s losses. As such, the net loss was attributed entirely to common stockholders. Because the Company has reported a net loss for all periods presented, diluted net loss per common share is the same as basic net loss per common share for those periods
Recent Accounting Pronouncements Not Yet Adopted	Recent Accounting Pronouncements Not Yet Adopted In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. The amendments in this ASU require disclosures, on an annual and interim basis, of significant segment expenses that are regularly provided to the chief operating decision maker (CODM), as well as the aggregate amount of other segment items included in the reported measure of segment profit or loss. This ASU requires that a public entity disclose the title and position of the CODM and an explanation of how the CODM uses the reported measure(s) of segment profit or loss. Public entities will be required to provide all annual disclosures currently required by Topic 280 in interim periods, and entities with a single reportable segment are required to provide all the disclosures required by the amendments in the update and existing segment disclosures in Topic 280. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. The Company is currently evaluating the impact that this update will have on its disclosures in the consolidated financial statements. In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which improves the transparency of income tax disclosures by requiring consistent categories and greater disaggregation of information in the effective tax rate reconciliation and income taxes paid disaggregated by jurisdiction. It also includes certain other amendments to improve the effectiveness of income tax disclosures. The standard is effective for fiscal years beginning after December 15, 2024, with early adoption permitted. The Company is currently evaluating the disclosure requirements related to the new standard. All other newly issued accounting pronouncements not yet effective have been deemed either immaterial or not applicable.
Assets and Liabilities Measured at Fair Value	Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis—Financial assets and liabilities held by the Company measured at fair value on a recurring basis include money market funds and marketable securities. Assets and Liabilities Measured and Recorded at Fair Value on a Nonrecurring Basis—The Company determines the fair value of long-lived assets held and used, such as intangible assets, by reference to independent appraisals, quoted market prices (e.g., an offer to purchase) and other factors. An impairment charge is recorded when the carrying value of the asset exceeds its fair value. There have been no impairment charges recorded to date. Based on the borrowing rates currently available to the Company for debt with similar terms and consideration of default and credit risk, the carrying value of the term loan approximates the fair value. The fair value of the term loan is estimated using Level 2 inputs. Assets and liabilities measured at fair value are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires management to make judgments and consider factors specific to the asset or liability.

Long Term Debt - CIBC Loan Narrative (Details)		1 Months Ended					3 Months Ended
Long Term Debt - CIBC Loan Narrative (Details)	Feb. 20, 2020 USD ($)	Feb. 28, 2023 USD ($)	Oct. 31, 2022 USD ($)	Oct. 31, 2021	Mar. 31, 2021 USD ($)	Apr. 30, 2020 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Mar. 31, 2022 payment
Debt Instrument [Line Items]
Proceeds from borrowing under term loan							$ 0	$ 20,000,000
Amortization of debt discount and debt issuance costs							16,000	10,000
Medium-term Notes \| CIBC Agreement
Debt Instrument [Line Items]
Revenue threshold for interest period extension term option			$ 5,000,000
CIBC Agreement \| Medium-term Notes
Debt Instrument [Line Items]
Debt instrument, face amount including accordion feature	$ 32,000,000
Proceeds from borrowing under term loan		$ 20,000,000
Debt term	5 years
Interest payments term	24 months			24 months
Principal and interest payments term	36 months			36 months
Fee amount						$ 200,000
Gain loss on amendment of debt instrument			0
Number of periodic payments \| payment									36
Payment of fees to lender and third parties (less than)			$ 100,000		$ 100,000		$ 500,000
Increase in loan interest rate				0
New interest only period			24 months
New interest only extension period			12 months
Cash and cash equivalents trigger for revenue requirement		$ 100,000,000
Minimum percentage of revenue requirement, trailing period of revenue		3 months
Minimum percentage of revenue requirement		80.00%
Cash and cash equivalents trigger for revenue requirement (less than)		$ 20,000,000
Unrestricted cash requirement period		6 months
Effective interest rate (as a percent)							10.10%
Amortization of debt discount and debt issuance costs							$ 100,000	100,000
Interest expense							$ 900,000	$ 600,000
CIBC Agreement \| Medium-term Notes \| Repaid During First Year After Third Amendment's Effective Date
Debt Instrument [Line Items]
Prepayment fee, percent of principal amount		2.00%
CIBC Agreement \| Medium-term Notes \| Repaid During Second Year After Third Amendment's Effective Date
Debt Instrument [Line Items]
Prepayment fee, percent of principal amount		1.00%
CIBC Agreement \| Medium-term Notes \| Prime Rate
Debt Instrument [Line Items]
Basis spread on variable rate		1.00%
CIBC Agreement, Tranche A \| Medium-term Notes
Debt Instrument [Line Items]
Proceeds from borrowing under term loan	$ 17,000,000
CIBC Agreement, Tranche B \| Medium-term Notes
Debt Instrument [Line Items]
Accordion feature on face amount of debt	8,000,000		$ 20,000,000
Gain loss on amendment of debt instrument					$ 0	$ 0
CIBC Agreement, Tranche C \| Medium-term Notes
Debt Instrument [Line Items]
Accordion feature on face amount of debt	$ 7,000,000		$ 10,000,000

Net Loss per Share Attributable to Common Stockholders

3 Months Ended

Mar. 31, 2024

Earnings Per Share [Abstract]

Net Loss per Share Attributable to Common Stockholders


	Three Months Ended March 31,
	2024		2023
Numerator
Net loss attributable to common stockholders	$	(13,749)	$	(15,860)
Denominator
Weighted-average common stock outstanding	38,636,109		37,630,339
Less: weighted-average common shares subject to repurchase	(80)		(57,957)
Weighted-average common shares used to compute basic and diluted net loss per share	38,636,029		37,572,382
Net loss per share attributable to common stockholders, basic and diluted	$	(0.36)	$	(0.42)


	As of March 31,
	2024	2023
Options to purchase common stock	3,626,551	3,278,913
Unvested restricted stock units	3,270,598	2,696,843
Unvested early exercised common stock options	56	46,012
Shares committed under employee stock purchase plan	17,528	20,155
Total	6,914,733	6,041,923

Fair Value Measurements - Schedule of Marketable Securities with Unrealized Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value
Less than 12 months	$ 32,522	$ 12,884
12 months or greater	0	1,745
Total	32,522	14,629
Unrealized Losses
Unrealized Losses	(62)	(24)
12 months or greater	0	(3)
Total	(62)	(27)
U.S. Government agency bonds
Fair Value
Less than 12 months	19,094	11,888
12 months or greater	0	1,745
Total	19,094	13,633
Unrealized Losses
Unrealized Losses	(43)	(23)
12 months or greater	0	(3)
Total	(43)	(26)
Commercial paper
Fair Value
Less than 12 months	13,428	996
12 months or greater	0	0
Total	13,428	996
Unrealized Losses
Unrealized Losses	(19)	(1)
12 months or greater	0	0
Total	$ (19)	$ (1)

Revenue Recognition	3 Months Ended
Revenue Recognition	Mar. 31, 2024
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue Recognition The Company’s contract liabilities consist of deferred revenue for remaining performance obligations by the Company to the customer after delivery, which was $0.1 million and $0.1 million as of March 31, 2024 and December 31, 2023, respectively. The deferred revenue as of December 31, 2023 of $0.1 million was recognized as revenue during the three months ended March 31, 2024. The deferred revenue as of December 31, 2022 of $0.1 million was recognized as revenue during the three months ended March 31, 2023. The Company disaggregates its revenue by major geographic region, which has been disclosed in Note 12, “Segment Information.”

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-9

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-10

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-15

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-12

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-12

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-12

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-12

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-12

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-13

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org//606/tableOfContent

+ Details

Cover Page - shares	3 Months Ended
Cover Page - shares	Mar. 31, 2024	Apr. 30, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
Document Transition Report	false
Entity File Number	001-39562
Entity Registrant Name	PULMONX CORPORATION
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0424412
Entity Address, Address Line One	700 Chesapeake Drive
Entity Address, City or Town	Redwood City
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94063
Country Region	1
City Area Code	650
Local Phone Number	364-0400
Title of 12(b) Security	Common Stock, $0.001 par value per share
Trading Symbol	LUNG
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		38,815,760
Entity Central Index Key	0001127537
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Amendment Flag	false

Commitments and Contingencies - Service Agreement (Details) - USD ($) $ in Thousands	3 Months Ended		24 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Apr. 30, 2022
Purchase Commitment, Excluding Long-Term Commitment [Line Items]
Cost of goods sold	$ 4,776	$ 3,946
Service Agreements
Purchase Commitment, Excluding Long-Term Commitment [Line Items]
Purchase obligation, to be paid, year one				$ 600
Purchase obligation, to be paid, year two				400
Purchase obligation, to be paid, year three				$ 400
Cost of goods sold			$ 1,100

Stockholders' Equity - Total Stock-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 5,673	$ 4,638
Stock options and restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	5,481	4,540
Employee stock purchase plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	192	98
Cost of goods sold
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	381	223
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	773	566
Selling, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 4,519	$ 3,849

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 35
-Paragraph 1D
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480483/718-10-35-1D

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 35
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480483/718-10-35-3

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(01)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(02)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(03)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(04)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(ii)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(01)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(02)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(03)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (e)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (e)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 25: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(ii)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 26: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iii)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 27: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iv)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 28: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(v)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

+ Details