CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Paid-In Capital	Accumulated Deficit	Treasury Stock	Total
Balance at Dec. 31, 2020	$ 19	$ 383,723	$ (326,013)	$ (258)	$ 57,471
Balance, shares at Dec. 31, 2020	19,172,020
Net loss			(5,390)		(5,390)
Common stock issued, net of issuance costs	$ 13	72,190			72,203
Common stock issued, net of issuance costs (in shares)	13,107,270
Stock compensation expense and related share issuances, net of shares withheld for payment of taxes		91			91
Stock compensation expense and related share issuances, net of shares withheld for payment of taxes (in shares)	57,186
Minimum withholding taxes on net share settlements of equity awards		(150)			(150)
Balance at Mar. 31, 2021	$ 32	455,854	(331,403)	(258)	124,225
Balance, shares at Mar. 31, 2021	32,336,476
Balance at Dec. 31, 2021	$ 35	468,578	(342,157)	(258)	126,198
Balance, shares at Dec. 31, 2021	35,279,724
Net loss			(2,809)		(2,809)
Common stock issued, net of issuance costs	$ 8	15,548			15,556
Common stock issued, net of issuance costs (in shares)	7,446,087
Stock compensation expense and related share issuances, net of shares withheld for payment of taxes		66			66
Stock compensation expense and related share issuances, net of shares withheld for payment of taxes (in shares)	91,773
Minimum withholding taxes on net share settlements of equity awards		(32)			(32)
Balance at Mar. 31, 2022	$ 43	$ 484,160	$ (344,966)	$ (258)	$ 138,979
Balance, shares at Mar. 31, 2022	42,817,584