Consolidated Statements of Stockholders' Equity - 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, 2018		8,817,988
Balance at Dec. 31, 2018			$ 88	$ 15,050		$ (92)	$ 10,875	$ 25,921
Stock options exercised (in shares)		107,000						107,000
Stock options exercised			1	209				$ 210
Net income							10,969	10,969
Stock compensation expense				191				191
Foreign currency translation adjustment						(2)		(2)
Balance (in shares) at Dec. 31, 2019		8,924,988
Balance at Dec. 31, 2019			89	15,450		(94)	21,844	$ 37,289
Stock options exercised (in shares)
Net income							8,161	$ 8,161
Stock compensation expense				386				386
Foreign currency translation adjustment						(46)		(46)
Common stock repurchased* (in shares)		(43,571)
Common stock repurchased*	[1]				(1,639)			(1,639)
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

[1] At December 31, 2020, approximately $3,361,000 was authorized for future repurchases of our common stock.