Income Taxes - Components of Net Deferred Tax Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Net operating loss carryforwards	$ 114,368	$ 58,527
Lease liabilities	25,754	16,971
Tax credit carryforwards	24,008	11,908
Intangibles	5,986
Accrued liabilities and allowances	4,401	3,643
Success payment liabilities	3,290	2,785
Stock-based compensation	1,854
Other		25
Gross deferred tax assets	179,661	93,859
Valuation allowance	(156,622)	(70,989)
Deferred tax assets, net of valuation allowance	23,039	22,870
Deferred tax liabilities:
Right-of-use assets	(21,940)	(14,577)
Fixed assets	(1,050)	(935)
Intangibles		(6,870)
Stock-based compensation		(488)
Other	(49)
Deferred tax liabilities	$ (23,039)	$ (22,870)