Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
REVENUE:
License and collaboration revenue	$ 1,748		$ 1,748
Grant revenue	20	$ 493	277	$ 818
Total revenue	1,768	493	2,025	818
OPERATING EXPENSES:
Research and development	44,151	22,009	71,432	39,420
General and administrative	9,577	4,933	19,332	8,831
Total operating expenses	53,728	26,942	90,764	48,251
LOSS FROM OPERATIONS	(51,960)	(26,449)	(88,739)	(47,433)
OTHER INCOME (EXPENSE)
Interest income	57	5	61	16
Interest and other expense	(1,338)	(529)	(2,411)	(840)
Change in fair value of warrant liabilities	1,315	(201)	956	(200)
Total other income (expense), net	34	(725)	(1,394)	(1,024)
Net loss attributable to common stockholders	$ (51,926)	$ (27,174)	$ (90,133)	$ (48,457)
Net loss per share available to common stockholders - basic	$ (0.42)	$ (0.28)	$ (0.76)	$ (0.50)
Net loss per share available to common stockholders - diluted	$ (0.42)	$ (0.28)	$ (0.76)	$ (0.50)
Weighted-average common stock outstanding - basic	123,249,757	96,327,956	118,430,851	96,314,179
Weighted-average common stock outstanding - diluted	123,249,757	96,327,956	118,430,851	96,314,179