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, 2020		8,885,797
Balance at Dec. 31, 2020			$ 89	$ 15,836	$ (1,639)	$ (140)	$ 30,005	$ 44,151
Stock options exercised (in shares)		67,500						67,500
Stock options exercised			1	107				$ 108
Common stock repurchased* (in shares)	[1]	(267,925)
Common stock repurchased*	[1]				(9,688)			(9,688)
Net income								9,039
Stock compensation expense (in shares)		4,443
Stock compensation expense				318				318
Foreign currency translation adjustment						(54)		(54)
Unrealized gain on marketable securities								0
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
Stock options exercised (in shares)								0
Common stock repurchased* (in shares)	[1]	(195,888)
Common stock repurchased*	[1]				(5,335)			$ (5,335)
Net income							13,881	13,881
Stock compensation expense (in shares)		8,808
Stock compensation expense				210				210
Foreign currency translation adjustment						110		110
Unrealized gain on marketable securities						23		23
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

[1] At December 31, 2022, approximately $18,338,000 was authorized for future repurchases of our common stock.