Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
Balance at Dec. 31, 2021	$ 201,884	$ 1	$ 425,614	$ (223,182)	$ (549)
Balance (in shares) at Dec. 31, 2021		78,248,401
Employee stock-based compensation, net	2,357		2,357
Shares withheld related to employee tax withholding	(499)		(499)
Shares withheld related to employee tax withholding (in shares)		(105,475)
Issuance of common stock under employee stock plans (in shares)		222,503
Issuance of common stock from warrant exercises	614		614
Issuance of common stock from warrant exercises (in shares)		472,500
Repurchase of common stock	(5,121)					$ (5,121)
Repurchase of common stock (in shares)		(1,464,217)
Unrealized gain/loss on Investments	(893)				(893)
Unrealized currency translation gain (loss)	31				31
Net Loss	(16,103)			(16,103)
Balance at Mar. 31, 2022	182,270	$ 1	428,086	(239,285)	(1,411)	(5,121)
Balance (in shares) at Mar. 31, 2022		77,373,712
Balance at Dec. 31, 2021	$ 201,884	$ 1	425,614	(223,182)	(549)
Balance (in shares) at Dec. 31, 2021		78,248,401
Sale of common stock, net of issuance costs (in shares)	0
Balance at Dec. 31, 2022	$ 145,322	$ 1	445,267	(292,049)	(1,102)	(6,795)
Balance (in shares) at Dec. 31, 2022		78,257,258
Employee stock-based compensation, net	3,569		3,569
Shares withheld related to employee tax withholding	(1,714)		(1,714)
Shares withheld related to employee tax withholding (in shares)		(201,905)
Issuance of common stock under employee stock plans	3,966		3,966
Issuance of common stock under employee stock plans (in shares)		1,085,524
Sale of common stock, net of issuance costs	$ 1,969		1,969
Sale of common stock, net of issuance costs (in shares)	0	178,204
Unrealized gain/loss on Investments	$ 501				501
Unrealized currency translation gain (loss)	(17)				(17)
Net Loss	(19,531)			(19,531)
Balance at Mar. 31, 2023	$ 134,065	$ 1	$ 453,057	$ (311,580)	$ (618)	$ (6,795)
Balance (in shares) at Mar. 31, 2023		79,319,081