Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Total
Balance (in shares) at Dec. 31, 2018	2,110,013				264,853
Balance at Dec. 31, 2018	$ 2,110	$ 30,622,547	$ (12,311,138)	$ (982,095)	$ (5,338,560)	$ 11,992,864
Net income			623,644			623,644
Foreign currency translation adjustment				22,211		22,211
Comprehensive income						645,855
Treasury stock acquired (Note 2) (in shares)					99,200
Treasury stock acquired (Note 2)					$ (540,144)	(540,144)
Other (in shares)					(489)
Other					$ 27,281	27,281
Stock-based compensation		5,306				5,306
Balance (in shares) at Mar. 31, 2019	2,110,013				363,564
Balance at Mar. 31, 2019	$ 2,110	30,627,853	(11,687,494)	(959,884)	$ (5,851,423)	12,131,162
Balance (in shares) at Dec. 31, 2019	2,110,013				363,564
Balance at Dec. 31, 2019	$ 2,110	30,643,771	(12,755,495)	(937,320)	$ (5,851,423)	11,101,643
Net income			662,336			662,336
Foreign currency translation adjustment				(39,611)		(39,611)
Comprehensive income						622,725
Balance (in shares) at Mar. 31, 2020	2,110,013				363,564
Balance at Mar. 31, 2020	$ 2,110	$ 30,643,771	$ (12,093,159)	$ (976,931)	$ (5,851,423)	$ 11,724,368