v3.8.0.1
DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration of Credit Risk and Significant Customers (Details) - Customer Concentration Risk
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
VAD A | Sales          
Revenue, Major Customer [Line Items]          
Significant customer, as a percentage 17.30% 14.00% 15.40% 13.80%  
VAD A | Accounts Receivable          
Revenue, Major Customer [Line Items]          
Significant customer, as a percentage     23.50%   22.40%
VAD B | Sales          
Revenue, Major Customer [Line Items]          
Significant customer, as a percentage 36.90% 19.20% 24.60% 11.00%  
VAD B | Accounts Receivable          
Revenue, Major Customer [Line Items]          
Significant customer, as a percentage     27.50%   14.40%
VAD C [Member] | Accounts Receivable          
Revenue, Major Customer [Line Items]          
Significant customer, as a percentage     0.00%   15.30%