Annual report pursuant to Section 13 and 15(d)

LONG-TERM DEBT AND COMMON STOCK WARRANT LIABILITY - Prior Credit Facilities Narrative (Details)

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LONG-TERM DEBT AND COMMON STOCK WARRANT LIABILITY - Prior Credit Facilities Narrative (Details) - Line of Credit
 12 Months Ended
May 13, 2016
Dec. 31, 2017
Capital One Bank | First Lien Credit Facility    
Debt Instrument [Line Items]    
Minimum base rate 1.00%  
Applicable margin rate 4.25%  
Term Loan | Abc Funding LLC | Second Lien Credit Agreement    
Debt Instrument [Line Items]    
Interest rate   13.50%
Prepayment penalty   2.00%