Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Operating expenses:
Research and development	$ 26,379	$ 19,384
General and administrative	11,407	10,164
Total operating expenses	37,786	29,548
Loss from operations	(37,786)	(29,548)
Other expense, net:
Interest expense	(1,073)	(1,099)
Interest income	57	476
Other (expense) income, net	(250)	358
Total other expense , net	(1,266)	(265)
Net loss	(39,052)	(29,813)
Other comprehensive income (loss), net:
Unrealized loss on available-for-sale securities, net	(59)	(41)
Foreign currency translation gain (loss)	218	(277)
Total other comprehensive income (loss), net	159	(318)
Comprehensive loss	$ (38,893)	$ (30,131)
Net loss per share, basic and diluted	$ (1.36)	$ (1.46)
Weighted-average number of common shares outstanding, basic and diluted	28,806,310	20,355,534