Consolidated Statements of Changes in Stockholders' Equity - USD ($)	Total	Common Shares	Paid in Capital	Retained Earnings (Deficit)
Balance at Dec. 31, 2012	$ 74,556,620	$ 215,652	$ 102,002,972	$ (27,662,004)
Balance, shares at Dec. 31, 2012		10,782,643
Shares issued for vested employee restricted stock units		$ 2,499	(2,499)
Shares issued for vested employees restricted stock units, shares		124,936
Shares issued for option exercises	$ 46,437	$ 177	46,260
Shares issued for option exercises, shares	8,862	8,862
Stock based compensation, net	$ 670,960		670,960
Dividends	0
Net income	17,596,942			17,596,942
Balance at Dec. 31, 2013	$ 92,870,959	$ 218,328	102,717,693	(10,065,062)
Balance, shares at Dec. 31, 2013		10,916,441
Shares issued for vested employee restricted stock units		$ 2,894	(2,894)
Shares issued for vested employees restricted stock units, shares		144,660
Shares issued for settlement of vested director restricted stock units		$ 811	(811)
Shares issued for settlement of vested director restricted stock units, shares	40,564	40,564
Shares issued for option exercises	$ 428,750	$ 1,098	427,652
Shares issued for option exercises, shares	56,362	54,906
Stock based compensation, net	$ 2,464,163		2,464,163
Dividends	(3,697,588)			(3,697,588)
Net income	4,047,122			4,047,122
Balance at Dec. 31, 2014	96,113,406	$ 223,131	105,605,803	(9,715,528)
Balance, shares at Dec. 31, 2014		11,156,571
Shares issued for vested employee restricted stock units		$ 1,297	(1,297)
Shares issued for vested employees restricted stock units, shares		64,834
Shares issued for option exercises	$ 284,250	$ 700	283,550
Shares issued for option exercises, shares	35,000	35,000
Stock based compensation, net	$ 1,303,708		1,303,708
Registration statement costs	(89,331)		(89,331)
Dividends	(6,337,568)			(6,337,568)
Net income	10,304,983			10,304,983
Balance at Dec. 31, 2015	$ 101,579,448	$ 225,128	$ 107,102,433	$ (5,748,113)
Balance, shares at Dec. 31, 2015		11,256,405