Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Collaboration and license revenue	$ 51,625	$ 827
Operating expenses:
Research and development	96,987	36,051
General and administrative	31,899	19,071
Change in fair value of contingent consideration and contingent value rights liabilities	27,317	1,510
Amortization of intangible assets	1,687	422
Total operating expenses	157,890	57,054
Gain on sale of assets to equity method investment	7,227
Loss from operations	(99,038)	(56,227)
Other income (expense):
Other income (expense), net	(170)	298
Change in fair value of redeemable convertible preferred stock tranche liability		(27,696)
Loss before income taxes and share of net loss of equity method investment	(99,208)	(83,625)
Income tax (expense) benefit	(2,093)	2,003
Share of net loss of equity method investment	(1,636)	0
Net loss	$ (102,937)	$ (81,622)
Net loss per share attributable to common stockholders, basic and diluted	$ (2.26)	$ (6.20)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted	45,607	13,168
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax of $0	$ 44	$ 39
Unrealized loss on marketable securities, net of tax of $0	(110)	(21)
Total other comprehensive income (loss)	(66)	18
Comprehensive loss	$ (103,003)	$ (81,604)