Income Taxes (Tables)

12 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Schedule of Loss before Income Taxes

Loss before income taxes were as follows (in thousands):

	Year Ended December 31,
	2023		2022		2021
Domestic	$	(147,786)	$	(138,883)	$	(94,693)
Foreign	777		2,640		(475)
Loss before income taxes	$	(147,009)	$	(136,243)	$	(95,168)

Schedule of Provision for Income Taxes

Provision for income taxes was as follows (in thousands):

	Year Ended December 31,
	2023		2022		2021
Current:
Federal	$	—	$	—	$	—
State	74		343		146
Foreign	1,321		1,560		11
Total current provision for income taxes	1,395		1,903		157
Deferred:
Federal	—		—		—
State	—		—		—
Foreign	(639)		(230)		—
Total deferred provision for income taxes	(639)		(230)		—
Total provision for income taxes	$	756	$	1,673	$	157

Schedule of Effective Tax Rate

Income tax expense (benefit) differed from the amount computed by applying the federal statutory income tax rate to pretax loss as a result of the following:

	Year Ended December 31,
	2023		2022		2021
Statutory rate	(21.0)	%	(21.0)	%	(21.0)	%
State tax	0.1		0.2		0.2
Permanent items	0.8		0.9		0.7
Transaction costs	—		—		(4.8)
Stock-based compensation	5.8		5.3		6.6
R&D credit	(3.2)		(3.2)		(4.2)
Other	—		0.5		—
Changes in valuation allowance	18.0		18.5		22.8
Foreign rate differential	—		—		(0.1)
Effective tax rate	0.5	%	1.2	%	0.2	%

Schedule of Deferred Taxes

Tax effects of significant items comprising the Company’s deferred taxes were as follows (in thousands):

	As of December 31,
	2023		2022
Deferred tax assets:
Net operating loss	$	104,693	$	95,567
Credit carryforwards	22,382		18,564
Stock-based compensation	11,609		8,071
Lease liability	16,247		14,945
Reserves, accruals and other	2,833		1,948
Capitalized R&D	37,270		22,944
Other	1,646		1,252
Total deferred tax assets	196,680		163,291
Valuation allowance	(181,884)		(150,294)
Total deferred tax assets, net	14,796		12,997
Deferred tax liabilities:
ROU asset basis	(13,900)		(12,752)
Total deferred tax liabilities	(13,900)		(12,752)
Net deferred tax assets	$	896	$	245

Schedule of Unrecognized Tax Benefits

A reconciliation of the beginning and ending balances of unrecognized tax benefit were as follows (in thousands):

	Year Ended December 31,
	2023		2022		2021
Gross unrecognized tax benefits - beginning of year	$	18,564	$	13,902	$	10,143
Increases related to current year tax positions	4,408		4,662		3,759
Increases related to prior year tax positions	241		—		—
Decreases related to prior year tax positions	(600)		—		—
Gross unrecognized tax benefits - end of year	$	22,613	$	18,564	$	13,902