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Series B Mandatorily Redeemable Preferred Stock (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 29, 2016
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]            
Interest expense   $ 3,501,199 $ 2,276,022 $ 6,864,243 $ 4,655,614  
Scheduled payments due in 2017   16,300,000   16,300,000    
Scheduled payments due in 2018   $ 18,400,000   $ 18,400,000    
Redeemable Convertible Preferred Stock Series B [Member]            
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]            
Preferred stock shares issued (in shares)   34,700   34,700   35,000
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
Deferred financing costs   $ 3,100,000   $ 3,100,000    
Interest expense   254,000 $ 230,000 508,000 $ 460,000  
Unamortized deferred stock costs   $ 1,100,000   $ 1,100,000   $ 1,600,000
Number of shares redeemed 300          
Number of shares redeemed, value $ 300,000          
Redeemable Convertible Preferred Stock Series B [Member] | Minimum [Member]            
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]            
Financial Instruments Subject to Mandatory Redemption, Return On Funds Invested   14.00%   14.00%