Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands		Common Stock Outstanding [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2020		8,885,797
Balance at Dec. 31, 2020			$ 89	$ 15,836	$ (1,639)	$ (140)	$ 30,005	$ 44,151
Common stock repurchased* (in shares)	[1]	(70,947)
Common stock repurchased*	[1]				(2,712)			(2,712)
Stock options exercised (in shares)		67,500
Stock options exercised			1	106				107
Net income							1,040	1,040
Stock compensation expense				57				57
Foreign currency translation adjustment						4		4
Balance (in shares) at Mar. 31, 2021		8,882,350
Balance at Mar. 31, 2021			90	15,999	(4,351)	(136)	31,045	42,647
Balance (in shares) at Dec. 31, 2021		8,689,815
Balance at Dec. 31, 2021			90	16,261	(11,327)	(194)	39,044	43,874
Common stock repurchased* (in shares)	[1]	(70,864)
Common stock repurchased*	[1]				(2,332)			$ (2,332)
Stock options exercised (in shares)								0
Net income							8,670	$ 8,670
Stock compensation expense				10				10
Foreign currency translation adjustment						1		1
Balance (in shares) at Mar. 31, 2022		8,618,951
Balance at Mar. 31, 2022			$ 90	$ 16,271	$ (13,659)	$ (193)	$ 47,714	$ 50,223

[1] At December 31, 2021, approximately $3,673,000 was authorized for future repurchases of our common stock.