CONDENSED CONSOLIDATED STATEMENTS 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		54			54
Issuance of common stock upon exercise of warrant (in shares)	49,007
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
Foreign currency translation adjustment			333		333
Stock-based compensation		2,748			2,748
Net loss				(29,799)	(29,799)
Balance at the end of the period at Sep. 30, 2021	$ 88	369,761	(246)	(252,784)	116,819
Balance at the end of the period (in shares) at Sep. 30, 2021	87,836,818
Balance at the beginning of the period at Jun. 30, 2021	$ 60	271,918	(449)	(241,645)	29,884
Balance at the beginning of the period (in shares) at Jun. 30, 2021	59,672,014
Increase (Decrease) in Stockholders' Equity
Issuance of common stock upon exercise of warrants		40			40
Issuance of common stock upon exercise of warrant (in shares)	37,027
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
Foreign currency translation adjustment			203		203
Stock-based compensation		1,003			1,003
Net loss				(11,139)	(11,139)
Balance at the end of the period at Sep. 30, 2021	$ 88	369,761	(246)	(252,784)	116,819
Balance at the end of the period (in shares) at Sep. 30, 2021	87,836,818
Balance at the beginning of the period at Dec. 31, 2021	$ 88	371,638	(267)	(263,572)	107,887
Balance at the beginning 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			957		957
Stock-based compensation		3,723			3,723
Net loss				(42,494)	(42,494)
Balance at the end of the period at Sep. 30, 2022	$ 99	375,350	690	(306,066)	70,073
Balance at the end of the period (in shares) at Sep. 30, 2022	99,021,376
Balance at the beginning of the period at Jun. 30, 2022	$ 88	374,108	94	(290,972)	83,318
Balance at the beginning of the period (in shares) at Jun. 30, 2022	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			596		596
Stock-based compensation		1,253			1,253
Net loss				(15,094)	(15,094)
Balance at the end of the period at Sep. 30, 2022	$ 99	$ 375,350	$ 690	$ (306,066)	$ 70,073
Balance at the end of the period (in shares) at Sep. 30, 2022	99,021,376