Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Revenue—related party	$ 9,730	$ 17,903
Operating expenses:
Research and development	48,943	34,334
General and administrative	22,220	22,760
Total operating expenses	71,163	57,094
Loss from operations	(61,433)	(39,191)
Interest income	91	785
Interest expense	(176)	(134)
Other income (expense), net	(606)	(953)
Loss before income tax benefit	(62,124)	(39,493)
Income tax expense (benefit)	(125)	(2,815)
Net loss	$ (61,999)	$ (36,678)
Net loss per share attributable to common stockholders, basic and diluted	$ (2.00)	$ (5.01)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted	30,952,152	7,319,977
Other comprehensive income (loss):
Unrealized gain (loss) on marketable debt securities, net of tax	$ (24)	$ 1
Total other comprehensive income (loss)	(24)	1
Comprehensive loss	$ (62,023)	$ (36,677)