Consolidated Statement of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated  Deficit	Cumulative Translation  Adjustments
Beginning balance (in shares) at Dec. 31, 2020		61,881
Beginning balance at Dec. 31, 2020	$ 16,424	$ 62	$ 158,190	$ (141,825)	$ (3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, net of offering costs (in shares)		4,059
Issuance of common stock, net of offering costs	26,740	$ 4	26,736
Exercise of stock options (in shares)		2,186
Exercise of stock options	9,495	$ 2	9,493
Share-based compensation	6,195		6,195
Translation adjustment	1				1
Net loss	(27,128)			(27,128)
Ending balance (in shares) at Dec. 31, 2021		68,126
Ending balance at Dec. 31, 2021	31,727	$ 68	200,614	(168,953)	(2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, net of offering costs (in shares)		6,297
Issuance of common stock, net of offering costs	7,747	$ 6	7,741
Issuance of restricted stock (in shares)		144
Share-based compensation	5,739		5,739
Translation adjustment	(1)				(1)
Net loss	(16,540)			(16,540)
Ending balance (in shares) at Dec. 31, 2022		74,567
Ending balance at Dec. 31, 2022	$ 28,672	$ 74	$ 214,094	$ (185,493)	$ (3)