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Stockholders' Equity - Narrative (Details) - USD ($)
 1 Months Ended 3 Months Ended 12 Months Ended
Jun. 30, 2015
Dec. 31, 2013
Mar. 31, 2015
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2014
May 12, 2015
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]              
Common shares issued during period for share based compensation (shares)           1,568,832  
Proceeds from the exercise of stock options       $ 51,000 $ 141,600 $ 3,252,801  
Stock issued, nonqualified stock options and incentive warrants noncash (shares)           2,635,696  
Shares received in lieu of cash payment (shares)           50,956  
Shares received in lieu of cash payment, average cost of shares (in USD per share)           $ 12.14  
Treasury stock retired (shares)           801,889  
Treasury stock retired, value           $ 1,019,840  
Purchases of treasury stock (shares)           186,714  
Treasury stock acquired, average cost (in USD per share)           $ 12.18  
Purchases of treasury stock       1,263,402 504,124 $ 2,273,857  
Cash dividends paid (per common share)   $ 0.10 $ 0.05        
Dividends paid       6,565,823 9,833,642 9,723,833  
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]              
Cash dividends to preferred stockholders       $ 674,302 $ 674,302 674,302  
Series A Cumulative Preferred Stock              
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]              
Issuance of preferred stock (in shares)       317,319      
Preferred stock dividend rate (as a percent)       8.50% 8.50%    
Amount of sinking fund available to stockholders       $ 0      
Preferred stock, liquidation preference (in dollars per share) $ 25.00     $ 25.00 $ 25.00    
Dividend payable monthly on preferred stock (in dollars per share)       $ 0.177083      
Cash dividends to preferred stockholders       $ 674,302 $ 674,302 $ 674,302  
Common Stock              
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]              
Purchases of treasury stock (shares)       218,682 70,907 186,714  
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]              
Percentage of cash dividends treated as qualified dividend income         14.00%    
Percentage of cash dividends treated as return of capital         86.00%    
Preferred              
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]              
Percentage of cash dividends treated as qualified dividend income         100.00%    
2015 Share Repurchase Program | Common Stock              
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]              
Purchases of treasury stock (shares) 265,762     202,390      
Treasury stock acquired, average cost (in USD per share) $ 6.05     $ 5.80      
Purchases of treasury stock $ 1,609,008     $ 1,173,899      
Amount authorized to be repurchased             $ 5,000,000