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Commitments and Contingencies (Details) - USD ($)
$ in Millions
Jun. 30, 2018
Dec. 31, 2017
Financial Condition and Liquidity [Abstract]    
Working capital $ (1.2) $ (4.1)
Costa Brava [Member]    
Legal proceedings [Abstract]    
Percentage of public preferred stock owned 12.70%  
Wynnefield [Member]    
Legal proceedings [Abstract]    
Percentage of public preferred stock owned 17.40%