CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (UNAUDITED) - 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	$ 30,004	$ 33,062	$ 90,450	$ 79,132
General and administrative	12,946	12,442	40,318	34,890
Total operating expenses	42,950	45,504	130,768	114,022
Loss from operations	(42,950)	(45,504)	(130,768)	(114,022)
Total other income (loss), net:
Interest income	668	253	978	1,233
Other income, (loss), net	210	(259)	(634)	(1,232)
Loss before income taxes	(42,072)	(45,510)	(130,424)	(114,021)
Income tax expense			150
Net loss	$ (42,072)	$ (45,510)	$ (130,574)	$ (114,021)
Net loss per share - basic	$ (0.50)	$ (0.72)	$ (1.83)	$ (1.82)
Net loss per share - diluted	$ (0.50)	$ (0.72)	$ (1.83)	$ (1.82)
Weighted-average common shares outstanding - basic	84,948,837	62,962,434	71,213,219	62,588,898
Weighted-average common shares outstanding - diluted	84,948,837	62,962,434	71,213,219	62,588,898
Comprehensive loss:
Net loss	$ (42,072)	$ (45,510)	$ (130,574)	$ (114,021)
Other comprehensive income (loss), net of tax:
Unrealized (loss) gain on available-for-sale securities	(119)	(3)	(408)	23
Foreign currency translation adjustment		(105)		(44)
Total other comprehensive loss	(119)	(108)	(408)	(21)
Comprehensive loss	$ (42,191)	$ (45,618)	$ (130,982)	$ (114,042)