Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets
Net operating loss carryforwards	$ 117,877	$ 89,951
Research and development capitalization	105,503	39,095
Tax credit carryforwards	50,293	30,965
Unearned revenue	23,007	0
Lease liabilities	13,208	11,442
Reserves and accruals	4,744	3,622
Stock-based compensation	5,080	2,231
Definite lived intangibles	0	969
Other	485	433
Gross deferred tax assets	320,197	178,708
Valuation allowance	(304,618)	(166,775)
Net deferred tax asset	15,579	11,933
Deferred tax liabilities
Right-of-use assets	(8,942)	(9,982)
Definite lived intangibles	(5,272)	0
Depreciable assets	(2,704)	(1,951)
Deferred tax liabilities	(16,918)	(11,933)
Net deferred tax liability	$ (1,339)	$ 0