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, 2019		8,924,988
Balance at Dec. 31, 2019			$ 89	$ 15,450		$ (94)	$ 21,844	$ 37,289
Net income							1,047	1,047
Stock compensation expense				62				62
Foreign currency translation adjustment						(31)		(31)
Balance (in shares) at Mar. 31, 2020		8,924,988
Balance at Mar. 31, 2020			89	15,512		(125)	22,891	38,367
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
Net income							1,040	1,040
Stock compensation expense				57				57
Foreign currency translation adjustment						4		4
Common stock repurchased* (in shares)		(70,947)
Common stock repurchased*	[1]				(2,712)			$ (2,712)
Stock options exercised (in shares)		67,500						67,500
Stock options exercised			1	106				$ 107
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

[1] At March 31, 2021, approximately $649,000 was authorized for future repurchases of our common stock. In April 2021, the Board authorized an additional $10 million for our share repurchase program.