UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Treasury Stock, Common [Member]	AOCI Attributable to Parent [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Beginning balance, value at Dec. 31, 2021	$ 191	$ (362)	$ (43)	$ 84,230	$ (80,097)	$ 3,919
Beginning Balance, shares at Dec. 31, 2021	19,135	10
Stock-based compensation expense				427		427
Exercise of stock options	$ 1			60		61
Exercise of stock options, shares	91
Public stock offering, net of fees	$ 3			946		949
Public stock offering, net of fees, shares	248
Net loss					(4,054)	(4,054)
Ending balance, value at Mar. 31, 2022	$ 195	$ (362)	(43)	85,663	(84,151)	1,302
Ending Balance, shares at Mar. 31, 2022	19,474	10
Beginning balance, value at Dec. 31, 2021	$ 191	$ (362)	(43)	84,230	(80,097)	3,919
Beginning Balance, shares at Dec. 31, 2021	19,135	10
Ending balance, value at Dec. 31, 2022	$ 212	$ (362)	(43)	92,304	(96,326)	(4,215)
Ending Balance, shares at Dec. 31, 2022	21,198	10
Stock-based compensation expense				94		94
Exercise of stock options				7		$ 7
Exercise of stock options, shares	58					67
Public stock offering, net of fees				21		$ 21
Public stock offering, net of fees, shares	2
Tax withholdings related to stock-based compensation awards				(5)		(5)
Net loss					(4,734)	(4,734)
Ending balance, value at Mar. 31, 2023	$ 212	$ (362)	$ (43)	$ 92,421	$ (101,060)	$ (8,832)
Ending Balance, shares at Mar. 31, 2023	21,258	10