Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2021	6,723,438
Balance at Dec. 31, 2021	$ 67	$ 27,277	$ 1,843	$ 29,187
Net loss Stock-based compensation	$ 0	0	(997)	(997)
Stock-based compensation (in shares)	5,500
Stock-based compensation	$ 0	97	0	97
Balance (in shares) at Mar. 31, 2022	6,728,938
Balance at Mar. 31, 2022	$ 67	27,374	846	$ 28,287
Balance (in shares) at Dec. 31, 2022	6,760,938			6,760,938
Balance at Dec. 31, 2022	$ 67	27,712	1,620	$ 29,399
Net loss Stock-based compensation		0	(40)	(40)
Stock-based compensation (in shares)	0
Stock-based compensation	$ 0	135	0	$ 135
Exercise of stock options and issuance of shares (in shares)	17,500			17,500
Exercise of stock options and issuance of shares	$ 0	73	0	$ 73
Balance (in shares) at Mar. 31, 2023	6,778,438			6,778,438
Balance at Mar. 31, 2023	$ 67	$ 27,920	$ 1,580	$ 29,567