CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue:
Federal contract revenue	$ 1,814	$ 1,790	$ 8,862	$ 3,303
Total revenue	6,081	1,790	16,461	15,976
Expenses:
Research and development	21,412	21,495	49,345	39,486
Selling, general and administrative	15,722	17,061	30,926	28,798
Cost of IP license fee				1,169
Total expenses	37,520	38,556	80,863	69,453
Loss from operations	(31,439)	(36,766)	(64,402)	(53,477)
Interest income	2,128	84	4,471	96
Interest expense	(4,208)	(2,656)	(8,355)	(4,348)
Other income (expense), net	47	(95)	84	(1,065)
Loss before income taxes	(33,472)	(39,433)	(68,202)	(58,794)
Benefit for income taxes	1,538		1,538
Net loss applicable to common stockholders	$ (31,934)	$ (39,433)	$ (66,664)	$ (58,794)
Per share information:
Net loss per share of common stock-basic	$ (0.61)	$ (1.06)	$ (1.28)	$ (1.59)
Net loss per share of common stock-diluted	$ (0.61)	$ (1.06)	$ (1.28)	$ (1.59)
Basic weighted average shares outstanding	52,551,918	37,155,917	52,162,962	37,023,976
Diluted weighted average shares outstanding	52,551,918	37,155,917	52,162,962	37,023,976
Other comprehensive loss:
Unrealized gain on available-for-sale securities	$ (188)		$ (114)
Total comprehensive loss	(32,122)	$ (39,433)	(66,778)	$ (58,794)
Product revenue, net
Revenue:
Revenue	4,249		7,581
Expenses:
Cost of product revenue	386		592
Collaboration revenue
Revenue:
Revenue	$ 18		$ 18	$ 12,673