Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Revenue	$ 2,395		$ 7,101
Operating expenses:
Research and development	19,791	$ 23,506	32,305	$ 61,688
General and administrative	5,988	9,867	14,739	21,336
Total operating expenses	25,779	33,373	47,044	83,024
Loss from operations	(23,384)	(33,373)	(39,943)	(83,024)
Other income (expense):
Interest income	223	27	542	41
Interest expense	(1,440)	(743)	(2,814)	(1,415)
Other income (expense)	3	(3)	(5)	(11)
Total other income (expense), net	(1,214)	(719)	(2,277)	(1,385)
Net loss	$ (24,598)	$ (34,092)	$ (42,220)	$ (84,409)
Net loss per common share, basic	$ (0.38)	$ (0.85)	$ (0.66)	$ (2.16)
Net loss per common share, diluted	$ (0.38)	$ (0.85)	$ (0.66)	$ (2.16)
Weighted average common shares outstanding, basic	64,244,531	40,142,403	63,755,435	39,163,996
Weighted average common shares outstanding, diluted	64,244,531	40,142,403	63,755,435	39,163,996