CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue:
Federal contract revenue	$ 87	$ 1,814	$ 239	$ 8,862
Total revenue	8,056	6,081	15,735	16,461
Expenses:
Research and development	20,897	21,412	45,015	49,345
Selling, general and administrative	16,710	15,722	35,336	30,926
Restructuring costs	1,950		1,950
Total expenses	40,292	37,520	83,792	80,863
Loss from operations	(32,236)	(31,439)	(68,057)	(64,402)
Interest income	1,109	2,128	2,571	4,471
Interest expense	(4,617)	(4,208)	(8,963)	(8,355)
Other (expense) income, net	(84)	47	(48)	84
Loss before income taxes	(35,828)	(33,472)	(74,497)	(68,202)
Benefit for income taxes		1,538		1,538
Net loss applicable to common shareholders	$ (35,828)	$ (31,934)	$ (74,497)	$ (66,664)
Per share information:
Net loss per share of common stock-basic	$ (0.63)	$ (0.61)	$ (1.31)	$ (1.28)
Net loss per share of common stock-diluted	$ (0.63)	$ (0.61)	$ (1.31)	$ (1.28)
Basic weighted average shares outstanding	57,064,095	52,551,918	56,957,953	52,162,962
Diluted weighted average shares outstanding	57,064,095	52,551,918	56,957,953	52,162,962
Other comprehensive income:
Unrealized (loss) gain on available-for-sale securities		$ (188)	$ 20	$ (114)
Total comprehensive loss	$ (35,828)	(32,122)	(74,477)	(66,778)
Product revenue, net
Revenue:
Revenue	7,951	4,249	15,460	7,581
Expenses:
Cost of product revenue	735	386	1,491	592
Collaboration revenue
Revenue:
Revenue	$ 18	$ 18	$ 36	$ 18