Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2020	13,419,847
Balance at Dec. 31, 2020	$ 135,000	$ 409,000	$ 59,476,000	$ 60,020,000
Net income			3,719,000	3,719,000
Common stock repurchased and retired (in shares)	(186,000)
Common stock repurchased and retired		(817,000)		(2,366,000)
Stock-based compensation expense		101,000		101,000
Options exercised (in shares)	89,494
Options exercised	$ 1,000	307,000		308,000
Balance (in shares) at Mar. 31, 2021	13,323,341
Balance at Mar. 31, 2021	$ 134,000	0	61,648,000	$ 61,782,000
Balance (in shares) at Dec. 31, 2021	13,115,341			13,115,341	[1]
Balance at Dec. 31, 2021	$ 132,000	0	62,488,000	$ 62,620,000	[1]
Net income			1,522,000	1,522,000
Common stock repurchased and retired (in shares)	(170,000)
Common stock repurchased and retired	$ (2,000)	(55,000)	(699,000)	(756,000)
Stock-based compensation expense	$ 0	$ 55,000	0	$ 55,000
Options exercised (in shares)				(0)
Balance (in shares) at Mar. 31, 2022	12,945,341			12,945,341
Balance at Mar. 31, 2022	$ 130,000		$ 63,311,000	$ 63,441,000

[1] The condensed consolidated balance sheet as of December 31, 2021 has been prepared using information from the audited consolidated balance sheet as of that date.