Condensed Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
OPERATING EXPENSES:
Research and development	$ 13,116	$ 17,597	$ 43,542	$ 46,846
General and administrative	6,240	10,833	20,436	31,658
Total operating expenses	19,356	28,430	63,978	78,504
LOSS FROM OPERATIONS	(19,356)	(28,430)	(63,978)	(78,504)
OTHER INCOME (EXPENSE), NET:
Interest income	227	76	414	321
Change in fair value of warrant liabilities	36		(4,321)
Other expense	(8)	(64)	(194)	(242)
Total other income (expense), net	255	12	(4,101)	79
Net loss	(19,101)	(28,418)	(68,079)	(78,425)
Net loss attributable to common stockholders-basic	(19,101)	(28,418)	(68,079)	(78,425)
Net loss attributable to common stockholders-diluted	$ (19,101)	$ (28,418)	$ (68,079)	$ (78,425)
Net loss per share attributable to common stockholders-basic (in dollars per share)	$ (0.40)	$ (1.09)	$ (2.02)	$ (3.08)
Net loss per share attributable to common stockholders-diluted (in dollars per share)	$ (0.40)	$ (1.09)	$ (2.02)	$ (3.08)
Weighted-average common stock outstanding-basic (in shares)	48,000,183	26,177,079	33,785,386	25,472,590
Weighted-average common stock outstanding-diluted (in shares)	48,000,183	26,177,079	33,785,386	25,472,590