Consolidated Statements of Changes in Shareholders Equity - USD ($)	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Total
Balance at Dec. 31, 2015	$ 11,876,895	$ (12,962,947)	$ 9,460,008	$ (2,530,790)	$ 37,340,395	$ 43,183,561
Balance (shares) at Dec. 31, 2015	3,348,543
Net income					5,850,998	5,850,998
Total other comprehensive income				194,589		194,589
Stock compensation expense			440,536			440,536
Tax benefit from exercise of employee stock options			567,309			567,309
Distribution to shareholders					(1,329,717)	(1,329,717)
Issuance of common stock	$ 94,762		299,776			$ 394,538
Issuance of common stock (shares)	37,905					316,699
Cash settlement of stock options			(2,274,374)			$ (2,274,374)
Purchase of treasury stock		(907,094)				(907,094)
Purchase of treasury stock (shares)	61,493
Balance at Dec. 31, 2016	$ 11,971,657	(13,870,041)	8,493,256	(2,336,201)	41,861,675	46,120,346
Balance (shares) at Dec. 31, 2016	3,324,955
Net income					4,052,479	4,052,479
Total other comprehensive income				702,202		702,202
Stock compensation expense			684,351			684,351
Distribution to shareholders					(1,447,077)	(1,447,077)
Issuance of common stock	$ 122,756		526,466			$ 649,222
Issuance of common stock (shares)	49,106					109,098
Cash settlement of stock options			(823,530)			$ (823,530)
Purchase of treasury stock (shares)						0
Balance at Dec. 31, 2017	$ 12,094,413	$ (13,870,041)	$ 8,880,543	$ (1,633,999)	$ 44,467,077	$ 49,937,993
Balance (shares) at Dec. 31, 2017	3,374,061