Consolidated Statements of Stockholders' Equity (USD $)
Total
Common Stock [Member]
Additional Paid-In Capital [Member]
Retained Earnings [Member]
Common Class A [Member]
Common Stock [Member]
Series B Preferred Stock [Member]
Series B Preferred Stock [Member]
Common Stock [Member]
Series B Preferred Stock [Member]
Retained Earnings [Member]
Series D Preferred Stock [Member]
Series D Preferred Stock [Member]
Common Stock [Member]
Series D Preferred Stock [Member]
Additional Paid-In Capital [Member]
Series D Preferred Stock [Member]
Retained Earnings [Member]
Stockholders' equity, value at Dec. 31, 2008 $ (915,075)   $ (1,974,698) $ 1,029,741 $ 2,466   $ 27,416          
Balance, preferred stock, shares at Dec. 31, 2008             62,500          
Balance, common stock, shares at Dec. 31, 2008         12,323,352              
Increase (Decrease) in Stockholders' Equity                        
Preferred dividends           (33,155) (27,404) (5,751) (800,874)     (800,874)
Share compensation expense 521,764   521,764                  
Exercise of stock options, shares         81,250              
Exercise of stock options, value 152,001   151,985   16              
Vesting of restricted shares, shares   275,000     157,500              
Vesting of restricted shares, value 3,928,750 28 3,928,690   32              
Conversion to common stock, shares   12,624,602     (12,562,102)   (62,500)     3,169,057    
Conversion to common stock, value 0 1,262 1,264   (2,514)   (12)   17,053,168 317 17,052,851  
Tax benefit from exercise of stock options 112,636   112,636                  
Initial public offering proceeds, shares   5,700,000                    
Initlal public offering proceeds, value 68,574,874 570 68,574,304                  
Net income 5,195,984     5,195,984                
Stockholders' equity, value at Dec. 31, 2009 93,790,073 2,177 88,368,796 5,419,100 0   0          
Balance, preferred stock, shares at Dec. 31, 2009             0          
Balance, common stock, shares at Dec. 31, 2009   21,768,659     0              
Increase (Decrease) in Stockholders' Equity                        
Share compensation expense 592,372   592,372                  
Payment of costs related to initial public offering (49,000)   (49,000)                  
Exercise of stock options, shares   275,191                    
Exercise of stock options, value 1,449,237 28 1,449,209                  
Tax benefit from exercise of stock options 790,693   790,693                  
Net income 8,404,638     8,404,638                
Stockholders' equity, value at Dec. 31, 2010 104,978,013 2,205 91,152,070 13,823,738                
Balance, common stock, shares at Dec. 31, 2010 22,043,850 22,043,850                    
Increase (Decrease) in Stockholders' Equity                        
Share compensation expense 1,343,752   1,343,752                  
Payment of costs related to initial public offering 0                       
Exercise of stock options, shares   112,007                    
Exercise of stock options, value 797,326 11 797,315                  
Tax benefit from exercise of stock options 154,335   154,335                  
Net income 12,048,172     12,048,172                
Stockholders' equity, value at Dec. 31, 2011 $ 119,321,598 $ 2,216 $ 93,447,472 $ 25,871,910                
Balance, common stock, shares at Dec. 31, 2011 22,155,857 22,155,857