Consolidated Statements of Operations and Comprehensive Loss (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenue—related party	$ 24,990	$ (3,981)
Operating expenses:
Research and development	13,483	11,743
General and administrative	6,801	5,630
Total operating expenses	20,284	17,373
Income (loss) from operations	4,706	(21,354)
Interest income	32	41
Interest expense	(18)	(50)
Other expense, net	(102)	(4)
Income (loss) before income tax benefit	4,618	(21,367)
Income tax benefit	0	(48)
Net income (loss)	$ 4,618	$ (21,319)
Weighted-average common shares used in computing net income (loss) per share attributable to common stockholders, diluted	45,958,941	26,099,954
Net income (loss) per share attributable to common stockholders, basic	$ 0.12	$ (0.82)
Net income (loss) per share attributable to common stockholders, diluted	$ 0.10	$ (0.82)
Weighted-average common shares used in computing net income (loss) per share attributable to common stockholders, basic	39,823,246	26,099,954
Other comprehensive income (loss):
Unrealized (loss) gain on marketable debt securities, net of tax		$ (22)
Total other comprehensive (loss) income		(22)
Comprehensive loss	$ 4,618	$ (21,341)