CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	At-the-market offering Common Stock.	At-the-market offering Additional Paid-In Capital	At-the-market offering Accumulated Other Comprehensive Income (Loss)	At-the-market offering	Follow On Public Offering Common Stock.	Follow On Public Offering Additional Paid-In Capital	Follow On Public Offering	Common Stock.	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Total
Balance at Dec. 31, 2020								$ 3	$ 295,281	$ 4	$ (223,140)	$ 72,148
Balance (in shares) at Dec. 31, 2020								28,372,634
Increase (Decrease) in Stockholders' Deficit
Stock-based compensation expense									1,225			1,225
Unrealized gain (loss) on marketable securities										2		2
Issuance of common stock		$ 601		$ 601	$ 1	$ 31,988	$ 31,989
Issuance of common stock (in shares)	153,257				9,783,660
Net loss											(11,580)	(11,580)
Balance at Mar. 31, 2021								$ 4	329,095	6	(234,720)	94,385
Balance (in shares) at Mar. 31, 2021								38,309,551
Balance at Dec. 31, 2020								$ 3	295,281	4	(223,140)	72,148
Balance (in shares) at Dec. 31, 2020								28,372,634
Increase (Decrease) in Stockholders' Deficit
Foreign currency translation adjustment												1,375
Net loss												(34,005)
Balance at Sep. 30, 2021								$ 5	360,913	1,375	(257,145)	105,148
Balance (in shares) at Sep. 30, 2021								46,546,915
Balance at Mar. 31, 2021								$ 4	329,095	6	(234,720)	94,385
Balance (in shares) at Mar. 31, 2021								38,309,551
Increase (Decrease) in Stockholders' Deficit
Stock-based compensation expense									1,173			1,173
Unrealized gain (loss) on marketable securities										(4)		(4)
Foreign currency translation adjustment										1,385		1,385
Issuance of common stock									11,216			11,216
Issuance of common stock (in shares)								4,111,608
Net loss											(11,752)	(11,752)
Balance at Jun. 30, 2021								$ 4	341,484	1,387	(246,472)	96,403
Balance (in shares) at Jun. 30, 2021								42,421,159
Increase (Decrease) in Stockholders' Deficit
Issuance of common stock upon exercise of Exchange Warrants (in shares)								1,457,947
Common stock issued on exercise of stock options									1,197			1,197
Common stock issued on exercise of stock options (in shares)								323,069
Stock-based compensation expense									1,096			1,096
Unrealized gain (loss) on marketable securities										(2)		(2)
Foreign currency translation adjustment										(10)		(10)
Issuance of common stock								$ 1	17,136			17,137
Issuance of common stock (in shares)								2,344,740
Net loss											(10,673)	(10,673)
Balance at Sep. 30, 2021								$ 5	360,913	1,375	(257,145)	105,148
Balance (in shares) at Sep. 30, 2021								46,546,915
Balance at Dec. 31, 2021								$ 5	361,669	1,869	(266,381)	97,162
Balance (in shares) at Dec. 31, 2021								46,553,511
Increase (Decrease) in Stockholders' Deficit
Stock-based compensation expense									739			739
Unrealized gain (loss) on marketable securities										(28)		(28)
Foreign currency translation adjustment			$ 146	$ 146
Net loss											(8,297)	(8,297)
Balance at Mar. 31, 2022								$ 5	362,408	1,987	(274,678)	89,722
Balance (in shares) at Mar. 31, 2022								46,553,511
Balance at Dec. 31, 2021								$ 5	361,669	1,869	(266,381)	97,162
Balance (in shares) at Dec. 31, 2021								46,553,511
Increase (Decrease) in Stockholders' Deficit
Foreign currency translation adjustment												(2,985)
Net loss												(31,491)
Balance at Sep. 30, 2022								$ 5	363,741	(1,193)	(297,872)	64,681
Balance (in shares) at Sep. 30, 2022								46,553,511
Balance at Mar. 31, 2022								$ 5	362,408	1,987	(274,678)	89,722
Balance (in shares) at Mar. 31, 2022								46,553,511
Increase (Decrease) in Stockholders' Deficit
Stock-based compensation expense									675			675
Unrealized gain (loss) on marketable securities										(54)		(54)
Foreign currency translation adjustment										(1,594)		(1,594)
Net loss											(8,363)	(8,363)
Balance at Jun. 30, 2022								$ 5	363,083	339	(283,041)	80,386
Balance (in shares) at Jun. 30, 2022								46,553,511
Increase (Decrease) in Stockholders' Deficit
Stock-based compensation expense									658			658
Unrealized gain (loss) on marketable securities										5		5
Foreign currency translation adjustment										(1,537)		(1,537)
Net loss											(14,831)	(14,831)
Balance at Sep. 30, 2022								$ 5	$ 363,741	$ (1,193)	$ (297,872)	$ 64,681
Balance (in shares) at Sep. 30, 2022								46,553,511