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Consolidated Statements of Stockholders' Equity - USD ($)
Total
Common Stock [Member]
Class A Common Stock [Member]
Common Stock [Member]
Class B Common Stock [Member]
Additional Paid-In Capital [Member]
Treasury Stock [Member]
Retained Earnings (Accumulated Deficit) [Member]
Accumulated Other Comprehensive Income [Member]
Beginning Balance at Dec. 31, 2013 $ 93,626,094 $ 9,074 $ 16,662 $ 117,130,362 $ (14,729,984) $ (8,824,642) $ 24,622
Beginning Balance, shares at Dec. 31, 2013   9,073,940 16,662,743   (2,788,608)    
Stock-based compensation 1,317,902 $ 202   1,317,700      
Stock-based compensation, shares   201,806          
Adjustment from related party acquisition (1,282)     (1,282)      
Tax benefit (shortfall) from vesting of restricted stock 88,620     88,620      
Purchase of treasury stock (377,480)       $ (377,480)    
Purchase of treasury stock, shares         (42,296)    
Net income 39,999,367         39,999,367  
Cash dividends, $0.18 per common share (4,108,244)         (4,108,244)  
Other comprehensive income (loss) (2,689)           (2,689)
Ending Balance at Dec. 31, 2014 130,542,288 $ 9,276 $ 16,662 118,535,400 $ (15,107,464) 27,066,481 21,933
Ending Balance, shares at Dec. 31, 2014   9,275,746 16,662,743   (2,830,904)    
Stock-based compensation 1,112,891 $ 174   1,112,717      
Stock-based compensation, shares   174,210          
Adjustment from related party acquisition (1,462)     (1,462)      
Tax benefit (shortfall) from vesting of restricted stock 151,036     151,036      
Purchase of treasury stock $ (254,405)       $ (254,405)    
Purchase of treasury stock, shares (51,275)       (51,275)    
Net income $ 6,362,322         6,362,322  
Cash dividends, $0.18 per common share (4,126,749)         (4,126,749)  
Other comprehensive income (loss) 53,226           53,226
Ending Balance at Dec. 31, 2015 $ 133,537,075 $ 9,450 $ 16,662 $ 119,495,619 $ (15,361,869) $ 29,302,054 $ 75,159
Ending Balance, shares at Dec. 31, 2015   9,449,956 16,662,743   (2,882,179)