Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Consolidated Statements of Income [Abstract]
Revenue		$ 17
Cost of revenue		1
Gross (loss) profit		16
Operating expenses:
Research and development	$ 11,478	11,688
General and administrative	6,686	8,584
Total operating expenses	18,164	20,272
Loss from operations	(18,164)	(20,256)
Other (income) expense:
Interest expense, net	105	511
Interest income	5
Change in fair value of convertible notes		2,667
Change in fair value of simple agreements for future equity		8,365
Change in fair value of warrant liability		214
Loss on foreign currency translation, net	1	(8)
Other (income) expense	99	11,765
Loss before income taxes	(18,263)	(32,021)
Net loss	$ (18,263)	$ (32,021)
Net loss per share, basic and diluted	$ (0.15)	$ (0.47)
Weighted average common shares outstanding, basic and diluted	125,709,613	68,550,993