CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital.	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Total
Balance at the beginning of the period at Dec. 31, 2020	$ 60	$ 270,155	$ (579)	$ (222,985)	$ 46,651
Balance at the beginning of the period (in shares) at Dec. 31, 2020	59,657,742
Increase (Decrease) in Stockholders' Equity
Issuance of common stock upon exercise of warrants		993			993
Issuance of common stock upon exercise of warrant (in shares)	530,643
Issuance of common stock upon exercise of prefunded warrants	$ 1	(1)
Issuance of common stock upon exercise of prefunded warrants (in shares)	559,705
Issuance of common stock in connection with Public Offering, net of issuance cost	$ 27	96,801			96,828
Issuance of common stock in connection with Public offering, net of issuance costs (in shares)	27,568,072
Issuance of common stock upon exercise of stock options		4			$ 4
Issuance of common stock upon exercise of stock options (in shares)	2,292				2,292
Foreign currency translation adjustment			312		$ 312
Stock-based compensation		3,686			3,686
Net loss				(40,587)	(40,587)
Balance at the end of the period at Dec. 31, 2021	$ 88	371,638	(267)	(263,572)	107,887
Balance at the end of the period (in shares) at Dec. 31, 2021	88,318,454
Increase (Decrease) in Stockholders' Equity
Issuance of common stock upon exercise of prefunded warrants	$ 11	(11)
Issuance of common stock upon exercise of prefunded warrants (in shares)	10,702,922
Foreign currency translation adjustment			395		395
Stock-based compensation		5,180			5,180
Net loss				(54,596)	(54,596)
Balance at the end of the period at Dec. 31, 2022	$ 99	$ 376,807	$ 128	$ (318,168)	$ 58,866
Balance at the end of the period (in shares) at Dec. 31, 2022	99,021,376