CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating expenses:
Research and development	$ 8,107	$ 12,423
General and administrative	5,047	5,058
Loss from operations	(13,154)	(17,481)
Other income (expenses):
Interest income	14	19
Interest expense	(2,303)	(1,253)
Net loss	$ (15,443)	$ (18,715)
Net loss per share of common stock, basic and diluted	$ (0.58)	$ (0.75)
Weighted-average shares of common stock outstanding, basic and diluted	26,749,379	24,988,198