Statements of Operations and Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Operating expenses
Research and development	$ 41,129	$ 39,162
General and administrative	17,968	21,536
Total operating expenses	59,097	60,698
Loss from operations	(59,097)	(60,698)
Interest income	1,582	19
Other income (loss), net	(42)	(13)
Net loss	(57,557)	(60,692)
Comprehensive income (loss)
Unrealized loss on available-for-sale securities	(21)	0
Comprehensive loss	$ (57,578)	$ (60,692)
Net loss per share - basic (in dollars per share)	$ (1.04)	$ (1.10)
Net loss per share - diluted (in dollars per share)	$ (1.04)	$ (1.10)
Basic weighted average number of shares outstanding (in shares)	55,221,161	55,041,662
Diluted weighted average common shares outstanding (in shares)	55,221,161	55,041,662