Consolidated Statements of Shareholders' Equity - USD ($)	Total	Common Stock	Additional Paid In Capital	Accumulated Other Comprehensive Loss	Retained Earnings
Beginning balance at Dec. 31, 2016	$ 22,515,071	$ 91,469	$ 9,604,634	$ (286,555)	$ 13,105,523
Beginning balance, shares at Dec. 31, 2016		9,146,937
Net income	2,603,534				2,603,534
Dividends, common stock	(549,255)				(549,255)
Options exercised	26,400	$ 341	26,059
Options exercised, shares		34,043
Common stock issued, net of shares withheld for employee taxes	301,677	$ 736	300,941
Common stock issued, net of shares withheld for employee taxes, shares		73,600
Foreign currency translation adjustment	(1,496)			(1,496)
Ending balance at Dec. 31, 2017	24,895,931	$ 92,546	9,931,634	(288,051)	15,159,802
Ending 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
Common stock issued, net of shares withheld for employee taxes	305,029	$ 751	304,278
Common stock issued, net of shares withheld for employee taxes, shares		75,101
Foreign currency translation adjustment	(7,683)			(7,683)
Ending balance at Dec. 31, 2018	$ 27,433,251	$ 93,382	$ 10,235,827	$ (295,734)	$ 17,399,776
Ending balance, shares at Dec. 31, 2018		9,338,191