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Stockholders' Equity - Series A Cumulative Perpetual Preferred Stock (Details) - USD ($)
 9 Months Ended 12 Months Ended
Sep. 30, 2016
Mar. 31, 2017
Mar. 31, 2016
Jun. 30, 2016
Series A Cumulative Perpetual Preferred Stock        
Consideration paid to preferred shareholders at redemption at liquidation preference   $ 7,932,975    
Cash dividends to preferred stockholders   250,990 $ 505,726  
Preferred        
Series A Cumulative Perpetual Preferred Stock        
Consideration paid to preferred shareholders at redemption at liquidation preference   $ 317    
Series A cumulative perpetual preferred stock        
Series A Cumulative Perpetual Preferred Stock        
Preferred stock dividend rate (as a percent)   8.50%   8.50%
Preferred stock, liquidation preference (in dollars per share)       $ 25.00
Series A cumulative perpetual preferred stock | Preferred        
Series A Cumulative Perpetual Preferred Stock        
Number of shares sold of series A cumulative perpetual preferred stock 317,319      
Preferred stock dividend rate (as a percent) 8.50% 8.50%    
Preferred stock, liquidation preference (in dollars per share) $ 25.00 $ 25.00    
Redemption price per share (in dollars per share) $ 25.082639      
Consideration paid to preferred shareholders at redemption at liquidation preference $ 7,932,975      
Payments for dividends accrued [1] 82,415      
Deemed dividend $ 1,002,440      
Amount of sinking fund available to stockholders   $ 0    
Dividend payable monthly on preferred stock (in dollars per share)   $ 0.177083    
Cash dividends to preferred stockholders   $ 250,990 $ 505,726  
[1] Includes the monthly dividend for October 2016 declared by the Company.