Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ 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	$ 12,480	$ 10,660	$ 24,949	$ 19,107
General and administrative	6,161	4,889	11,510	9,111
Total operating expenses	18,641	15,549	36,459	28,218
Loss from operations	(18,641)	(15,549)	(36,459)	(28,218)
Other income (expense):
Other income (expense)	(33)	0	(71)	0
Interest income (expense)	(417)	21	(341)	27
Total other income (expense), net	(450)	21	(412)	27
Net loss	(19,091)	(15,528)	(36,871)	(28,191)
Net unrealized loss on investments	(1)	0	(41)	0
Comprehensive loss	$ (19,092)	$ (15,528)	$ (36,912)	$ (28,191)
Net loss per share - basic	$ (0.74)	$ (0.60)	$ (1.43)	$ (1.13)
Net loss per share - diluted	$ (0.74)	$ (0.60)	$ (1.43)	$ (1.13)
Weighted-average number of common shares outstanding - basic	25,883	25,684	25,874	24,851
Weighted-average number of common shares outstanding - diluted	25,883	25,684	25,874	24,851