UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Shares Issued [Member]	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Beginning balance, value at Dec. 31, 2020	$ 17,428	$ 174	$ (362)	$ 77,187	$ (61,295)	$ (43)
Stock-based compensation				204
Exercise of stock options	197	2		159
Public stock offerings proceeds, net of fees
Net loss					(3,903)		(3,903)
Ending balance, value at Mar. 31, 2021	17,625	176		77,550	(65,198)		12,123
Beginning balance, value at Dec. 31, 2021	19,135	191	(362)	84,230	(80,097)	(43)	3,919
Stock-based compensation				427
Exercise of stock options	339	1		60
Public stock offerings proceeds, net of fees		3		946
Net loss					(4,054)		(4,054)
Ending balance, value at Mar. 31, 2022	$ 19,474	$ 195		$ 85,663	$ (84,151)		$ 1,302