Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
BALANCE (in shares) at Dec. 31, 2014	10,245,534
BALANCE at Dec. 31, 2014	$ 26,984	$ 6,013,325	$ (2,894,068)	$ 46,664,829	$ (688,058)	$ 49,123,012
Shares issued – stock option exercise (in shares)	2,000					2,000
Shares issued – stock option exercise	$ 5	9,915				$ 9,920
Stock-based compensation (in shares)	34,484
Stock-based compensation	$ 73	106,496				106,569
Purchase of treasury stock (in shares)	(528,725)
Purchase of treasury stock			(3,708,862)			(3,708,862)
Net income				4,063,647		4,063,647
Translation adjustment					(961,471)	(961,471)
BALANCE (in shares) at Sep. 30, 2015	9,753,293
BALANCE at Sep. 30, 2015	$ 27,062	6,129,736	(6,602,930)	50,728,476	(1,649,529)	48,632,815
BALANCE (in shares) at Dec. 31, 2015	9,753,293
BALANCE at Dec. 31, 2015	$ 27,062	6,168,489	(6,602,930)	53,067,234	(1,687,679)	50,972,176
Stock-based compensation (in shares)	33,685
Stock-based compensation	$ 80	156,506				156,586
Purchase of treasury stock (in shares)	(520,482)
Purchase of treasury stock			(3,675,654)			(3,675,654)
Net income				4,342,262		4,342,262
Translation adjustment					222,187	222,187
BALANCE (in shares) at Sep. 30, 2016	9,266,496
BALANCE at Sep. 30, 2016	$ 27,142	$ 6,324,995	$ (10,278,584)	$ 57,409,496	$ (1,465,492)	$ 52,017,557