Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands		Common Stock Outstanding [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock, Common [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
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)
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
Balance (in shares) at Dec. 31, 2022			8,502,735
Balance at Dec. 31, 2022			$ 90	16,471	(16,662)	(61)	52,925	52,763
Net income							1,256	1,256
Foreign currency translation adjustment						(53)		(53)
Unrealized gain on marketable securities						37		37
Balance (in shares) at Mar. 31, 2023		8,502,735
Balance at Mar. 31, 2023			$ 90	$ 16,471	$ (16,662)	$ (77)	$ 54,181	$ 54,003

[1] At March 31, 2023, approximately $18,338,000 was authorized for future repurchases of our common stock.