Consolidated Statements of Changes in Stockholders' Equity - USD ($)	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Total
Balance at Dec. 31, 2014	$ 11,632,805	$ (12,283,251)	$ 7,941,330	$ (1,647,098)	$ 33,784,270	$ 39,428,056
Balance (shares) at Dec. 31, 2014	3,291,352
Net income					4,793,525	4,793,525
Total other comprehensive loss				(883,692)		(883,692)
Stock compensation expense			513,986			513,986
Distribution to shareholders					(1,237,400)	(1,237,400)
Issuance of common stock	$ 244,090		1,004,692			$ 1,248,782
Issuance of common stock (shares)	97,636					97,636
Purchase of treasury stock		(679,696)				$ (679,696)
Purchase of treasury stock (shares)	(40,445)
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 loss				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