CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS
Revenues	$ 32	$ 838
Operating expenses:
Research and development	15,104	11,878
General and administrative	4,427	3,821
Total operating expenses	19,531	15,699
Loss from operations	(19,499)	(14,861)
Other income (expense):
Interest expense	(62)	(12)
Interest income	21	42
Other income (expense), net	110	(33)
Total other income (expense), net	69	(3)
Net loss	(19,430)	(14,864)
Other comprehensive income - unrealized gain on short-term investments		5
Comprehensive loss	$ (19,430)	$ (14,859)
Net loss per share, basic	$ (0.44)	$ (0.38)
Net loss per share, diluted	$ (0.44)	$ (0.38)
Weighted-average common shares outstanding, basic	43,969,481	38,914,990
Weighted-average common shares outstanding, diluted	43,969,481	38,914,990