CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Operating expenses:
Research and development	$ 14,110	$ 13,188	$ 42,044	$ 38,485
Selling, general and administrative	6,044	5,931	20,457	17,567
Gain (Loss) on Disposition of Assets	0	0	(509)	0
Total operating expenses	20,154	19,119	61,992	56,052
Loss from operations	(20,154)	(19,119)	(61,992)	(56,052)
Other expense, net:
Interest income	14	2	21	7
Interest expense	(1,018)	(920)	(2,849)	(2,717)
Change in fair value of derivative liability	0	(62)	511	(36)
Other (expense) income, net	(441)	(74)	(440)	323
Total other expense, net	(1,445)	(1,054)	(2,757)	(2,423)
Loss before provision for income taxes	(21,599)	(20,173)	(64,749)	(58,475)
Provision for income taxes	(13)	2	14	14
Net loss and comprehensive loss	(21,586)	(20,175)	(64,763)	(58,489)
Deemed dividend on Class B Warrant price reset	(287)	0	(2,546)	(8,239)
Net loss attributable to common stockholders	$ (21,873)	$ (20,175)	$ (67,309)	$ (66,728)
Net loss per share attributable to common stockholders—basic	$ (0.26)	$ (0.76)	$ (1.32)	$ (2.71)
Net loss per share attributable to common stockholders—diluted	$ (0.26)	$ (0.76)	$ (1.32)	$ (2.71)
Weighted average shares of common stock outstanding—diluted	83,211,000	26,609,000	50,976,000	24,667,000
Weighted average shares of common stock outstanding—basic	83,211,000	26,609,000	50,976,000	24,667,000