CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating expenses:
Research and development	$ 14,113	$ 12,104
Selling, general and administrative	7,664	5,832
Gain (Loss) on Disposition of Assets	(509)	0
Total operating expenses	21,268	17,936
Loss from operations	(21,268)	(17,936)
Other income (expense):
Interest income	3	2
Interest expense	(913)	(891)
Change in fair value of derivative liability	176	(31)
Other income, net	60	186
Total other expense, net	(674)	(734)
Loss before provision for income taxes	(21,942)	(18,670)
Provision for income taxes	23	6
Net loss and comprehensive loss	(21,965)	(18,676)
Deemed dividend on Class B Warrant price reset	(2,259)	(8,239)
Net loss attributable to common stockholders	$ (24,224)	$ (26,915)
Net loss per share attributable to common stockholders—basic and diluted	$ (0.72)	$ (1.30)
Weighted average common shares outstanding—basic and diluted (in shares)	33,737,000	20,751,000