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Consolidated Statement of Changes in Stockholders' Equity - USD ($)
Total
Preferred
Common Stock
Additional Paid-in Capital
Retained Earnings
Treasury Stock
Balance at Jun. 30, 2013 $ 54,836,161 $ 317 $ 29,410 $ 31,813,239 $ 24,013,035 $ (1,019,840)
Balance (in shares) at Jun. 30, 2013   317,319 28,608,969      
Increase (Decrease) in Stockholders' Equity            
Issuance of restricted common stock     $ 40 (40)    
Issuance of restricted common stock (shares)     39,732      
Exercise of warrants     $ 905 (905)    
Exercise of warrants (in shares)     905,391      
Exercise of stock options 3,871,407   $ 3,299 3,868,108    
Exercise of stock options (shares)     3,299,367      
Forfeiture of restricted stock     $ (51) 51    
Forfeiture of restricted stock (in shares)     (51,099)      
Acquisition of treasury stock $ (2,273,857)         (2,273,857)
Acquisitions of treasury stock (shares) (186,714)   (186,714)      
Retirements of treasury stock     $ (988) (3,292,709)   3,293,697
Stock-based compensation $ 1,728,687     1,728,687    
Tax benefits related to stock-based compensation 509,096     509,096    
Net income 3,597,313       3,597,313  
Common stock cash dividends (9,723,833)       (9,723,833)  
Preferred stock cash dividends (674,302)       (674,302)  
Recovery of short swing profits 6,850     6,850    
Balance at Jun. 30, 2014 51,877,522 $ 317 $ 32,615 34,632,377 17,212,213 0
Balance (in shares) at Jun. 30, 2014   317,319 32,615,646      
Increase (Decrease) in Stockholders' Equity            
Issuance of restricted common stock 67   $ 214 (147)    
Issuance of restricted common stock (shares)     213,466      
Exercise of stock options $ 141,600   $ 87 141,513    
Exercise of stock options (shares) 87,000   87,000      
Acquisition of treasury stock $ (504,124)         (504,124)
Acquisitions of treasury stock (shares)     (70,907)      
Retirements of treasury stock     $ (71) (504,053)   504,124
Stock-based compensation 943,653     943,653    
Tax benefits related to stock-based compensation 1,633,946     1,633,946    
Net income 4,991,857       4,991,857  
Common stock cash dividends (9,833,642)       (9,833,642)  
Preferred stock cash dividends (674,302)       (674,302)  
Balance at Jun. 30, 2015 48,576,577 $ 317 $ 32,845 36,847,289 11,696,126 0
Balance (in shares) at Jun. 30, 2015   317,319 32,845,205      
Increase (Decrease) in Stockholders' Equity            
Issuance of restricted common stock 33   $ 272 (239)    
Issuance of restricted common stock (shares)     272,098      
Exercise of stock options $ 127,500   $ 50 127,450    
Exercise of stock options (shares) 50,000   50,000      
Forfeiture of restricted stock     $ (41) 41    
Forfeiture of restricted stock (in shares)     (40,758)      
Acquisition of treasury stock $ (1,263,402)         (1,263,402)
Acquisitions of treasury stock (shares)     (218,682)      
Retirements of treasury stock     $ (219) (1,263,183)   1,263,402
Stock-based compensation 1,809,548     1,809,548    
Tax benefits related to stock-based compensation 9,650,657     9,650,657    
Net income 24,660,362       24,660,362  
Common stock cash dividends (6,565,823)       (6,565,823)  
Preferred stock cash dividends (674,302)       (674,302)  
Balance at Jun. 30, 2016 $ 76,321,150 $ 317 $ 32,907 $ 47,171,563 $ 29,116,363 $ 0
Balance (in shares) at Jun. 30, 2016   317,319 32,907,863