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Series B Mandatorily Redeemable Preferred Stock (Details) - USD ($)
 1 Months Ended 12 Months Ended
Aug. 31, 2014
Dec. 31, 2016
Dec. 31, 2015
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]      
Interest expense   $ 13,531,337 $ 10,774,660
Total unamortized deferred stock costs   1,942,000 $ 2,052,000
Scheduled payments due in 2017   $ 32,700,000  
Preferred stock, redemption date   Aug. 01, 2017  
Redeemable Convertible Preferred Stock Series B [Member]      
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]      
Proceeds from private placement offering $ 40,000,000    
Preferred stock shares issued (in shares)   32,700 35,000
Preferred stock, par or stated value (in dollars per share)   $ 0.01 $ 0.01
Liquidation preference per share (in dollars per share)   $ 1,000 $ 1,000
Financial Instruments Subject to Mandatory Redemption, Return On Funds Invested   14.00%  
Financial Instruments Subject to Mandatory Redemption, Monthly Payout, Percent   10.00%  
Financial Instruments Subject to Mandatory Redemption, Monthly Percent Accrued   4.00%  
Deferred financing costs   $ 3,100,000  
Interest expense   1,014,000 $ 952,000
Total unamortized deferred stock costs   $ 592,000 $ 1,600,000
Number of shares redeemed   2,300  
Number of shares redeemed, value   $ 2,300,000  
Preferred stock shares outstanding (in shares)   32,700 35,000