Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($)	Common Stock	Additional Paid In Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Total
Beginning balance at Dec. 31, 2017	$ 92,546	$ 9,931,634	$ (288,051)	$ 15,159,802	$ 24,895,931
Beginning balance, shares at Dec. 31, 2017	9,254,580
Net income				523,380	523,380
Dividends, common stock				(555,275)	(555,275)
Foreign currency translation adjustment			(3,466)		(3,466)
Ending Balance at Mar. 31, 2018	$ 92,546	9,931,634	(291,517)	15,127,907	24,860,570
Ending balance, shares at Mar. 31, 2018	9,254,580
Beginning balance at Dec. 31, 2018	$ 93,382	10,235,827	(295,734)	17,399,776	27,433,251
Beginning balance, shares at Dec. 31, 2018	9,338,191
Net income				715,170	715,170
Dividends, common stock				(468,306)	(468,306)
Options exercised	$ 279	13,520			13,799
Options exercised, shares	27,928
Adoption of ASU 2016-02 Leases (Topic 842)				972	972
Foreign currency translation adjustment			1,497		1,497
Ending Balance at Mar. 31, 2019	$ 93,661	$ 10,249,347	$ (294,237)	$ 17,647,612	$ 27,696,383
Ending balance, shares at Mar. 31, 2019	9,366,119