Condensed Consolidated Statements of Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]
Balance at December 31,2021 at Dec. 31, 2020	$ 14,514		$ 244,850	$ (230,336)
Balance, shares at Dec. 31, 2020		77,573,680
Private placement of common stock, net of issuance costs of $1,926	12,831		12,831
Private placement of common stock, net of issuance costs of $1,926, shares		8,888,890
Warrants issued in connection with the private placement	5,243		5,243
Warrants issued in connection with the private placement to placement agents	351		351
Common stock issued on vesting of restricted stock units
Common stock issued on vesting of restricted stock units, shares		244,716
Stock-based compensation	456		456
Net loss	(29)			(29)
Balance at March 31, 2022 at Mar. 31, 2021	33,366		263,731	(230,365)
Balance, shares at Mar. 31, 2021		86,707,286
Balance at December 31,2021 at Dec. 31, 2021	30,883		266,068	(235,185)
Balance, shares at Dec. 31, 2021		87,068,980
Common stock issued on vesting of restricted stock units
Common stock issued on vesting of restricted stock units, shares		244,721
Stock-based compensation	613		613
Net loss	(2,213)			(2,213)
Balance at March 31, 2022 at Mar. 31, 2022	$ 29,283		$ 266,681	$ (237,398)
Balance, shares at Mar. 31, 2022		87,313,701