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Consolidated Statements of Stockholders' Equity (USD $)
Total
Class A Common Stock
Class B Common Stock [Member]
Additional Paid-In Capital
Treasury Stock
Accumulated Deficit
Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2010 $ 62,226,337 $ 8,709 $ 16,662 $ 115,784,129 $ (14,213,542) $ (38,551,397) $ (818,224)
Balance, shares at Dec. 31, 2010   8,708,806 16,662,743   (2,685,675)    
Stock-based compensation 619,100 110   618,990      
Stock-based compensation, shares   110,484          
Tax benefit from vesting of restricted stock 80,104     80,104      
Purchase of treasury stock (214,137)       (214,137)    
Purchase of treasury stock, shares         (33,983)    
Net income 10,100,325         10,100,325  
Other comprehensive income 835,493           835,493
Balance at Dec. 31, 2011 73,647,222 8,819 16,662 116,483,223 (14,427,679) (28,451,072) 17,269
Balance, shares at Dec. 31, 2011   8,819,290 16,662,743   (2,719,658)    
Stock-based compensation 434,069 78   433,991      
Stock-based compensation, shares   78,150          
Adjustment from related party acquisition 59,301     59,301      
Tax benefit from vesting of restricted stock (80,104)     (80,104)      
Purchase of treasury stock (111,854)       (111,854)    
Purchase of treasury stock, shares         (32,587)    
Net income 11,031,270         11,031,270  
Cash dividends, $0.085 per common share (1,927,564)         (1,927,564)  
Other comprehensive income (3,083)           (3,083)
Balance at Dec. 31, 2012 $ 83,049,257 $ 8,897 $ 16,662 $ 116,896,411 $ (14,539,533) $ (19,347,366) $ 14,186
Balance, shares at Dec. 31, 2012   8,897,440 16,662,743   (2,752,245)