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
Condensed Consolidated Statements of Operations and Comprehensive Loss
Revenue	$ 3,165	$ 3,179	$ 10,575	$ 9,638
Costs and expenses:
Cost of revenue	740	890	2,165	2,297
Research and development	4,512	4,487	14,459	15,136
General and administrative	6,744	4,882	26,224	14,640
Total costs and expenses	11,996	10,259	42,848	32,073
Loss from operations	(8,831)	(7,080)	(32,273)	(22,435)
Other income (expense):
Interest income	359	4	428	30
Interest expense	(620)	(205)	(1,640)	(558)
Loss on extinguishment of debt			(997)	(53)
Total other income (expense), net	(261)	(201)	(2,209)	(581)
Net loss and comprehensive loss	$ (9,092)	$ (7,281)	$ (34,482)	$ (23,016)
Net loss per common share, basic (in dollars per share)	$ (0.14)	$ (0.14)	$ (0.58)	$ (0.47)
Net loss per common share, diluted (in dollars per share)	$ (0.14)	$ (0.14)	$ (0.58)	$ (0.47)
Weighted average common shares outstanding, basic (in shares)	64,458,741	52,081,497	59,745,042	48,822,303
Weighted average common shares outstanding, diluted (in shares)	64,458,741	52,081,497	59,745,042	48,822,303