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PRIVATE PLACEMENT MEMORANDUM (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Proceeds from unsecured subordinated promissory notes $ 1,035 $ 0
Less debt issuance costs and discount Payment of commission and placement agent fees and related expenses (155) 0
Principal payments on promissory notes (650) 0
Non-cash activity    
Common stock issued to placement agent (255)  
Obligation to issue common stock to private placement noteholders (255)  
Amortization of issuance costs and debt discount 511  
Unsecured subordinated promissory notes, net of issuance and debt discount 231  
Current portion of unsecured subordinated promissory notes (231) $ 0
Long-term portion of unsecured subordinated promissory notes $ 0