Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Expenses
Research and development	$ 12,915	$ 19,953	$ 26,367	$ 37,017
General and administrative	6,835	8,077	14,914	16,683
Total expenses	19,750	28,030	41,281	53,700
Interest and other income (expense)
Other income	71		163	750
Interest income	493	153	922	197
Net other income (expense)	564	153	1,085	947
Loss before income tax expense	(19,186)	(27,877)	(40,196)	(52,753)
Net loss	$ (19,186)	$ (27,877)	$ (40,196)	$ (52,753)
Net loss per share, basic	$ (0.49)	$ (0.72)	$ (1.03)	$ (1.38)
Net loss per share, diluted	$ (0.49)	$ (0.72)	$ (1.03)	$ (1.38)
Weighted-average shares used in computing net loss per share, basic	39,156,584	38,591,436	39,124,553	38,288,831
Weighted-average shares used in computing net loss per share, diluted	39,156,584	38,591,436	39,124,553	38,288,831