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]	Treasury Stock, Common [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
Common stock repurchased* (in shares)	[1]	70,947
Common stock repurchased*	[1]				2,712				2,712
Stock options exercised (in shares)		67,500
Stock options exercised			1	106					107
Net income									1,040
Stock compensation expense				57					57
Foreign currency translation adjustment						4			4
Common stock repurchased* (in shares)	[1]	(70,947)
Common stock repurchased*	[1]				(2,712)				(2,712)
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
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 compensation expense									198
Balance (in shares) at Jun. 30, 2021		8,742,599
Balance at Jun. 30, 2021			90	16,197	(9,399)	(132)	33,850		40,606
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									6,379
Balance (in shares) at Sep. 30, 2021		8,700,569
Balance at Sep. 30, 2021			90	16,229		(145)	36,384	$ (10,900)	41,658
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
Common stock repurchased* (in shares)	[1]	144,194
Common stock repurchased*	[1]				5,048				5,048
Net income							2,805		2,805
Foreign currency translation adjustment						4			4
Stock compensation expense (in shares)		4,443
Stock compensation expense				198
Common stock repurchased* (in shares)	[1]	(144,194)
Common stock repurchased*	[1]				(5,048)				(5,048)
Balance (in shares) at Jun. 30, 2021		8,742,599
Balance at Jun. 30, 2021			90	16,197	(9,399)	(132)	33,850		40,606
Common stock repurchased* (in shares)	[1]	42,030
Common stock repurchased*	[1]				1,501				1,501
Net income							2,534		2,534
Stock compensation expense				32					32
Foreign currency translation adjustment						(13)			(13)
Common stock repurchased* (in shares)	[1]	(42,030)
Common stock repurchased*	[1]				(1,501)				(1,501)
Balance (in shares) at Sep. 30, 2021		8,700,569
Balance at Sep. 30, 2021			90	16,229		(145)	36,384	$ (10,900)	41,658
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
Common stock repurchased* (in shares)	[1]	(70,864)
Common stock repurchased*	[1]				(2,332)				(2,332)
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, 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
Net income									$ 12,885
Unrealized loss on marketable securities									(6)
Balance (in shares) at Sep. 30, 2022		8,510,565
Balance at Sep. 30, 2022			90	16,421	(16,369)	164	51,929		52,235
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
Common stock repurchased* (in shares)	[1]	58,447
Common stock repurchased*	[1]				1,347				1,347
Net income							2,856		2,856
Foreign currency translation adjustment						243			243
Stock compensation expense (in shares)		6,504
Stock compensation expense				150					150
Common stock repurchased* (in shares)	[1]	(58,447)
Common stock repurchased*	[1]				(1,347)				(1,347)
Balance (in shares) at Jun. 30, 2022		8,567,008
Balance at Jun. 30, 2022			90	16,421	(15,006)	50	50,570		52,125
Common stock repurchased* (in shares)	[1]	56,443
Common stock repurchased*	[1]				1,363				$ 1,363
Stock options exercised (in shares)									0
Net income							1,359		$ 1,359
Foreign currency translation adjustment						120			120
Common stock repurchased* (in shares)	[1]	(56,443)
Common stock repurchased*	[1]				(1,363)				(1,363)
Unrealized loss on marketable securities						(6)			(6)
Balance (in shares) at Sep. 30, 2022		8,510,565
Balance at Sep. 30, 2022			$ 90	$ 16,421	$ (16,369)	$ 164	$ 51,929		$ 52,235

[1] At September 30, 2022, approximately $18,631,000 was authorized for future repurchases of our common stock