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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Schedule of Federal and State Income Tax Provision

The federal and state income tax provision for the year ended December 31, 2023, 2022 and 2021 are summarized as follows (in thousands):

		Year Ended December 31,
		2023				2022				2021
Current:
Federal		$	4,178			$	2,209			$	—
State			1,034				1,045				—
Income tax provision		$	5,212			$	3,254			$	—

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation of the federal statutory rate to the Company’s effective tax rate is as follows for the years ended December 31, 2023, 2022, and 2021 (in thousands):

		Year Ended December 31,
		2023				2022				2021
Tax benefit at federal statutory rate		$	(26,188	)		$	(27,205	)		$	(7,627	)
State income taxes			(431	)			(344	)			398
Tax credits, net of uncertain tax positions			(14,460	)			(15,138	)			(7,042	)
Uncertain tax positions			612				2,687				—
Stock-based compensation			4,842				4,919				(2,368	)
Change in valuation allowance			40,661				38,421				16,800
Other			176				(86	)			(161	)
Income tax provision		$	5,212			$	3,254			$	—

Schedule of Deferred Tax Assets and Liabilities

The tax effects of temporary differences that give rise to significant components of the Company’s deferred tax assets and liabilities consist of (in thousands):

		December 31,
		2023				2022
Deferred tax assets:
Net operating loss		$	12,448			$	20,963
Accrued bonus			931				806
Tax credits			26,682				26,319
Stock-based compensation			15,311				13,351
Deferred revenue			63,004				67,673
Lease liability			9,030				10,055
Section 174 R&D capitalization			62,305				35,150
Refund liability			24,707				—
Other			521				1,608
Gross deferred tax assets			214,939				175,925
Less valuation allowance			(204,550	)			(164,316	)
Total deferred tax assets		$	10,389			$	11,609
Deferred tax liabilities:
Depreciation and amortization		$	(4,544	)		$	(5,155	)
Right-of-use assets			(5,845	)			(6,454	)
Gross deferred tax liabilities			(10,389	)			(11,609	)
Deferred tax assets, net		$	—			$	—

Schedule of Unrecognized Tax Benefits

The following table summarizes the activity related to the Company’s unrecognized tax benefits for the years ended December 31, 2023, 2022, and 2021 (in thousands):

Balance as of December 31, 2021		$	6,939
Increases related to tax positions taken during the    current year			8,199
Balance as of December 31, 2022			15,138
Decreases related to tax positions taken during the    prior year			(594	)
Increase related to tax positions taken during the    prior year			2,588
Increases related to tax positions taken during the    current year			3,071
Balance as of December 31, 2023		$	20,203

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