Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating expenses:
Research and development	$ 9,581	$ 10,265	$ 18,952	$ 18,866
General and administrative	4,491	2,395	9,613	6,825
Total operating expenses	14,072	12,660	28,565	25,691
Loss from operations	(14,072)	(12,660)	(28,565)	(25,691)
Interest income	60	7	109	16
Other income, net	87	0	6,584	0
Net loss	(13,925)	(12,653)	(21,872)	(25,675)
Unrealized loss on marketable securities, net of tax	(47)	0	(357)	0
Comprehensive loss	$ (13,972)	$ (12,653)	$ (22,229)	$ (25,675)
Net loss per share attributable to common stockholders, basic	$ (0.40)	$ (0.69)	$ (0.63)	$ (1.41)
Net loss per share attributable to common stockholders, diluted	$ (0.40)	$ (0.69)	$ (0.63)	$ (1.41)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic	34,945	18,217,000	34,904	18,186,000
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted	34,945	18,217,000	34,904	18,186,000