Consolidated Statements of Stockholders' Equity (Unaudited) - 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, 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
Unrealized gain on marketable securities					37		37
Foreign currency translation adjustment					(53)		(53)
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
Balance (in shares) at Dec. 31, 2023	8,295,408
Balance at Dec. 31, 2023		90	16,621	(20,359)	32	56,320	52,704
Net income						430	430
Unrealized gain on marketable securities					5		5
Foreign currency translation adjustment					(2)		(2)
Balance (in shares) at Mar. 31, 2024	8,160,758
Balance at Mar. 31, 2024		$ 90	16,781	(22,006)	$ 35	$ 56,750	51,650
Common stock repurchased* (in shares)	(134,650)
Common stock repurchased*				$ (1,647)			(1,647)
Stock compensation expense			$ 160				$ 160