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Series B Mandatorily Redeemable Preferred Stock (Details) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Aug. 14, 2019
Aug. 01, 2019
Jul. 31, 2018
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2018
Dec. 31, 2015
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]                    
Preferred stock shares outstanding (in shares)       16,000   16,000     16,900  
Financial instruments subject to mandatory redemption, preferred return on funds invested       14.00%   14.00%        
Interest expense       $ 2,491,870 $ 3,147,179 $ 5,037,073 $ 6,224,156      
Preferred stock extend redemption date     Aug. 01, 2019         Aug. 01, 2018    
Preferred stock redemption extension fee paid               $ 153,500    
Preferred stock redemption extension additional fee paid     $ 153,500              
Preferred stock dividend rate percentage           14.00%        
Percentage of excess dividend payment       10.00%   10.00%        
Redeemable Convertible Preferred Stock Series B [Member]                    
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]                    
Preferred stock shares issued (in shares)       16,000   16,000     16,900 35,000
Preferred stock shares outstanding (in shares)       16,000   16,000     16,900  
Preferred stock, par or stated value (in dollars per share)       $ 0.01   $ 0.01     $ 0.01  
Liquidation preference per share (in dollars per share)       $ 1,000   $ 1,000     $ 1,000  
Financial instruments subject to mandatory redemption, preferred return on funds invested       14.00%   14.00%        
Deferred financing costs       $ 3,100,000   $ 3,100,000        
Interest expense       61,000 $ 19,000 122,000 $ 254,000      
Total unamortized deferred costs       0   $ 0     $ 122,000  
Number of shares redeemed           900     13,800  
Number of shares redeemed           $ 900,000     $ 13,800,000  
Redeemable preferred stock       $ 16,000,000   $ 16,000,000     $ 16,900,000  
Preferred stock liquidation preference value (in dollars per share)       $ 1,000   $ 1,000     $ 1,000  
Redeemable Convertible Preferred Stock Series B [Member] | Subsequent Event [Member]                    
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]                    
Preferred stock shares outstanding (in shares) 14,000                  
Liquidation preference per share (in dollars per share)   $ 1,000                
Number of shares redeemed 2,000 16,000                
Number of shares redeemed $ 2,000,000                  
Redeemable preferred stock   $ 16,000,000                
Preferred stock dividend rate percentage   24.00%                
Preferred stock liquidation preference value (in dollars per share)   $ 1,000