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SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING STANDARDS SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING STANDARDS - Concentrations of Risk (Details)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2018
Mar. 31, 2017
Concentration Risk [Line Items]      
Financial institutions agreement, notice period   90 days  
Minimum      
Concentration Risk [Line Items]      
Financial institutions agreement, term   3 years  
Maximum      
Concentration Risk [Line Items]      
Financial institutions agreement, term   5 years  
One Customer | Customer Concentration Risk | Accounts Receivable      
Concentration Risk [Line Items]      
Concentration risk 12.00%    
Largest FI Partner | Supplier Concentration Risk | Financial Institution Partner      
Concentration Risk [Line Items]      
Concentration risk   69.00% 69.00%