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, 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	43,682				43,762
Net income				1,520,997		1,520,997
Purchase of treasury stock (in shares)	(404,423)
Purchase of treasury stock			(2,870,740)			(2,870,740)
Translation adjustment					637,515	637,515
Balance (in shares) at Mar. 31, 2016	9,382,555
Balance at Mar. 31, 2016	$ 27,142	6,212,171	(9,473,670)	54,588,231	(1,050,164)	50,303,710
Translation adjustment					637,515	637,515
Balance (in shares) at Dec. 31, 2016	9,266,496
Balance at Dec. 31, 2016	$ 27,142	6,368,279	(10,278,584)	59,469,493	(1,893,129)	53,693,201
Stock-based compensation (in shares)	9,005
Stock-based compensation	$ 22	44,772				44,794
Net income				1,231,265		1,231,265
Translation adjustment					356,340	356,340
Balance (in shares) at Mar. 31, 2017	9,275,501
Balance at Mar. 31, 2017	$ 27,164	6,413,051	(10,278,584)	60,700,758	(1,536,789)	55,325,600
Translation adjustment					$ 356,340	$ 356,340