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				1,644,731	1,644,731
Dividends, common stock				(555,275)	(555,275)
Stock based compensation	$ 40	13,830			13,870
Stock based compensation, shares	4,000
Foreign currency translation adjustment			(3,844)		(3,844)
Ending Balance at Jun. 30, 2018	$ 92,586	9,945,464	(291,895)	16,249,258	25,995,413
Ending balance, shares at Jun. 30, 2018	9,258,580
Beginning balance at Mar. 31, 2018	$ 92,546	9,931,634	(291,517)	15,127,907	24,860,570
Beginning balance, shares at Mar. 31, 2018	9,254,580
Net income				1,121,351	1,121,351
Stock based compensation	$ 40	13,830			13,870
Stock based compensation, shares	4,000
Foreign currency translation adjustment			(378)		(378)
Ending Balance at Jun. 30, 2018	$ 92,586	9,945,464	(291,895)	16,249,258	25,995,413
Ending balance, shares at Jun. 30, 2018	9,258,580
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				1,724,738	1,724,738
Dividends, common stock				(468,306)	(468,306)
Options exercised	$ 279	13,520			13,799
Options exercised, shares	27,928
Stock based compensation	$ 40	13,220			13,260
Stock based compensation, shares	4,000
Cumulative effect adjustment on adoption of ASU 2016-02 Leases (Topic 842)				972	972
Foreign currency translation adjustment			2,010		2,010
Ending Balance at Jun. 30, 2019	$ 93,701	10,262,567	(293,724)	18,657,180	28,719,724
Ending balance, shares at Jun. 30, 2019	9,370,119
Beginning balance at Mar. 31, 2019	$ 93,661	10,249,347	(294,237)	17,647,612	27,696,383
Beginning balance, shares at Mar. 31, 2019	9,366,119
Net income				1,009,568	1,009,568
Stock based compensation	$ 40	13,220			13,260
Stock based compensation, shares	4,000
Foreign currency translation adjustment			513		513
Ending Balance at Jun. 30, 2019	$ 93,701	$ 10,262,567	$ (293,724)	$ 18,657,180	$ 28,719,724
Ending balance, shares at Jun. 30, 2019	9,370,119