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, 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 adjustment	(114)				(114)
Unrealized gain (loss) on available for sales securities	(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
Beginning balance at Dec. 31, 2022	100,593	[1]	$ 36	389,105	(289)	(288,259)
Beginning balance, shares at Dec. 31, 2022			36,136,480
Issuance of common stock on exercise of stock options and vesting of restricted stock units	56			56
Issuance of common stock on exercise of stock options and vesting of restricted stock units, shares			141,953
Stock based compensation	1,481			1,481
Foreign currency translation adjustment	92				92
Unrealized gain (loss) on available for sales securities	235				235
Net loss	(12,254)					(12,254)
Ending balance at Mar. 31, 2023	$ 90,203		$ 36	$ 390,642	$ 38	$ (300,513)
Ending balance, shares at Mar. 31, 2023			36,278,433

[1] The balance sheet as of December 31, 2022 is derived from the audited financial statements as of that date.