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Liquidity and Going Concern Assessment (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2017
USD ($)
states
Mar. 31, 2016
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Debt Instrument [Line Items]        
Working capital deficit $ (10,500)      
Cash and cash equivalents 226 $ 2,031 $ 1,866 $ 2,035
Past due payables 4,900      
Net cash used in operating activities of continuing operations 3,239 3,390    
Loss from continuing operations (3,242) (3,269)    
Proceeds from issuance of common stock and warrants $ 1,300 $ 4,712    
Number of operating leases settlements | states 3      
Reduction in operating lease obligations $ 700      
Line of credit | 2016 Credit and Security Agreement        
Debt Instrument [Line Items]        
Borrowings outstanding 4,000      
Available borrowing availability 200      
Loans payable | Credit agreement        
Debt Instrument [Line Items]        
Outstanding borrowings under term loan $ 3,700