Condensed Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating expenses:
Research and development	$ 2,384	$ 18,302	$ 32,136	$ 54,325
General and administrative	11,294	7,852	26,372	24,563
Restructuring and impairment costs	11,349	0	51,128	0
Total operating expenses	25,027	26,154	109,636	78,888
Loss from operations	(25,027)	(26,154)	(109,636)	(78,888)
Other income (expense), net:
Interest income, net	2,955	1,472	8,387	2,435
Loss on disposal of assets	0	0	(71)	0
Other income (expense), net:	(413)	0	(413)	0
Total other income, net	2,542	1,472	7,903	2,435
Net loss	(22,485)	(24,682)	(101,733)	(76,453)
Unrealized gain (loss) on investments in marketable securities	176	(563)	953	(1,596)
Comprehensive loss	$ (22,309)	$ (25,245)	$ (100,780)	$ (78,049)
Net loss per share attributable to common stockholders-basic	$ (0.39)	$ (0.45)	$ (1.79)	$ (1.4)
Net loss per share attributable to common stockholders-diluted	$ (0.39)	$ (0.45)	$ (1.79)	$ (1.4)
Weighted-average shares used in computing net loss per share-basic	57,257,241	55,206,139	56,748,995	54,591,593
Weighted-average shares used in computing net loss per share-diluted	57,257,241	55,206,139	56,748,995	54,591,593