Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Revenue	$ 1,788	$ 4,746	$ 6,311	$ 11,847
Operating expenses:
Research and development	14,946	11,791	50,676	44,096
General and administrative	7,902	8,589	22,324	23,328
Impairment of long-lived assets	4,838	616	4,838	616
Total operating expenses	27,686	20,996	77,838	68,040
Loss from operations	(25,898)	(16,250)	(71,527)	(56,193)
Other income (expense):
Change in fair value of warrant liability	75	(100,456)	(67)	(100,456)
Change in fair value of term loan	(1,703)		(4,035)
Interest income	2,107	1,109	5,240	1,651
Interest expense	(24)	(1,471)	(80)	(4,285)
Other expense	(81)	(19)	(44)	(24)
Total other income (expense), net	374	(100,837)	1,014	(103,114)
Net loss	$ (25,524)	$ (117,087)	$ (70,513)	$ (159,307)
Net loss per common share, basic	$ (0.1)	$ (0.93)	$ (0.29)	$ (1.88)
Net loss per common share, diluted	$ (0.1)	$ (0.93)	$ (0.29)	$ (1.88)
Weighted average common shares outstanding, basic	267,824,045	125,700,799	244,052,057	84,630,796
Weighted average common shares outstanding, diluted	267,824,045	125,700,799	244,052,057	84,630,796