Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance at Dec. 31, 2020	$ 172,262	$ 29	$ 318,574	$ 313	$ (146,654)
Beginning balance, shares at Dec. 31, 2020		29,543,222
Exercise of stock options	441		441
Exercise of stock options, shares		32,722
Stock based compensation	6,991		6,991
Foreign currency translation adjustments	0
Unrealized loss on available for sale investments	(124)			(124)
Net loss	(23,086)				(23,086)
Ending balance at Mar. 31, 2021	156,484	$ 29	326,006	189	(169,740)
Ending balance, shares at Mar. 31, 2021		29,575,944
Beginning balance at Dec. 31, 2021	118,586	$ 30	355,234	(79)	(236,599)
Beginning balance, shares at Dec. 31, 2021		30,074,412
Issuance of common stock in connection with open market sales agreement, net of issuance costs	608		608
Issuance of common stock in connection with open market sales agreement, net of issuance costs, shares		51,769
Exercise of stock options	14		14
Exercise of stock options, shares		23,389
Stock based compensation	9,240		9,240
Foreign currency translation adjustments	(114)			(114)
Unrealized loss on available for sale investments	(313)			(313)
Net loss	(21,641)				(21,641)
Ending balance at Mar. 31, 2022	$ 106,380	$ 30	$ 365,096	$ (506)	$ (258,240)
Ending balance, shares at Mar. 31, 2022		30,149,570