Consolidated Statements of Shareholders' Equity - 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				2,795,249	2,795,249
Dividends, common stock				(555,275)	(555,275)
Options exercised	$ 85	(85)
Options exercised, shares	8,510
Stock based compensation	$ 814	330,009			330,823
Stock based compensation, shares	81,400
Shares withheld in consideration of employee tax obligations related to stock based compensation	$ (63)	(25,731)			$ (25,794)
Shares withheld in consideration of employee tax obligations related to stock based compensation, shares	(6,299)				6,299
Foreign currency translation adjustment			(7,683)		$ (7,683)
Ending Balance at Dec. 31, 2018	$ 93,382	10,235,827	(295,734)	17,399,776	27,433,251
Ending balance, shares at Dec. 31, 2018	9,338,191
Net income				3,498,714	3,498,714
Dividends, common stock				(468,306)	(468,306)
Options exercised	$ 279	13,520			13,799
Options exercised, shares	27,928
Stock based compensation	$ 830	274,710			275,540
Stock based compensation, shares	83,000
Shares withheld in consideration of employee tax obligations related to stock based compensation	$ (63)	(20,886)			$ (20,949)
Shares withheld in consideration of employee tax obligations related to stock based compensation, shares	(6,310)				6,310
Cumulative effect adjustment on adoption of ASU 2016-02 Leases (Topic 842)				972	$ 972
Foreign currency translation adjustment			1,243		1,243
Ending Balance at Dec. 31, 2019	$ 94,428	$ 10,503,171	$ (294,491)	$ 20,431,156	$ 30,734,264
Ending balance, shares at Dec. 31, 2019	9,442,809