Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating expenses
Research and development	$ 9,707	$ 5,498
General and administrative	5,241	3,573
Total operating expenses	14,948	9,071
Other income (loss), net	(2)	429
Net loss	$ (14,950)	$ (8,642)
Net loss per common stock – basic (in dollars per share)	$ (0.27)	$ (0.18)
Net loss per common stock – diluted (in dollars per share)	$ (0.27)	$ (0.18)
Basic weighted average common shares outstanding (in shares)	54,944,421	49,168,451
Diluted weighted average common shares outstanding (in shares)	54,944,421	49,168,451