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PRIVATE PLACEMENT MEMORANDUM (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Proceeds from unsecured subordinated promissory notes $ 0 $ 1,035  
Less debt issuance costs and discount Payment of commission and placement agent fees and related expenses 0 $ (155)  
Principal payments on promissory notes (331)    
Non-cash activity      
Current portion of unsecured subordinated promissory notes (7)   $ (231)
Private Placement Memorandum [Member]      
Proceeds from unsecured subordinated promissory notes 1,035    
Less debt issuance costs and discount Payment of commission and placement agent fees and related expenses (155)    
Principal payments on promissory notes (981)    
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 618    
Unsecured subordinated promissory notes, net of issuance and debt discount 7    
Current portion of unsecured subordinated promissory notes (7)    
Long-term portion of unsecured subordinated promissory notes $ 0