Condensed Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating expenses
Research and development	$ 10,701	$ 9,707
General and administrative	4,664	5,241
Total operating expenses	15,365	14,948
Other income (loss), net	14	(2)
Net loss	$ (15,351)	$ (14,950)
Net loss per share – basic (in dollars per share)	$ (0.28)	$ (0.27)
Net loss per share – diluted (in dollars per share)	$ (0.28)	$ (0.27)
Basic weighted average common shares outstanding (in shares)	55,143,537	54,944,421
Diluted weighted average common shares outstanding (in shares)	55,143,537	54,944,421