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, 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
Beginning balance at Dec. 31, 2019	$ 94,428	10,503,171	(294,491)	20,431,156	30,734,264
Beginning balance, shares at Dec. 31, 2019	9,442,809
Net income				4,079,202	4,079,202
Dividends, common stock				(378,484)	(378,484)
Options exercised	$ 153	20,547			20,700
Options exercised, shares	15,296
Stock based compensation	$ 40	22,180			22,220
Stock based compensation, shares	4,000
Foreign currency translation adjustment			(1,382)		(1,382)
Ending Balance at Jun. 30, 2020	$ 94,621	10,545,898	(295,873)	24,131,874	34,476,520
Ending balance, shares at Jun. 30, 2020	9,462,105
Beginning balance at Mar. 31, 2020	$ 94,481	10,503,118	(296,819)	21,058,037	31,358,817
Beginning balance, shares at Mar. 31, 2020	9,448,105
Net income				3,452,321	3,452,321
Dividends, common stock				(378,484)	(378,484)
Options exercised	$ 100	20,600			20,700
Options exercised, shares	10,000
Stock based compensation	$ 40	22,180			22,220
Stock based compensation, shares	4,000
Foreign currency translation adjustment			946		946
Ending Balance at Jun. 30, 2020	$ 94,621	$ 10,545,898	$ (295,873)	$ 24,131,874	$ 34,476,520
Ending balance, shares at Jun. 30, 2020	9,462,105