DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration of Credit Risk and Significant Customers (Details) - Customer Concentration Risk |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2017 |
Dec. 31, 2016 |
Mar. 31, 2016 |
|
| VAD A | Sales | |||
| Revenue, Major Customer [Line Items] | |||
| Significant customer, as a percentage | 15.10% | 13.30% | |
| VAD A | Accounts Receivable | |||
| Revenue, Major Customer [Line Items] | |||
| Significant customer, as a percentage | 19.40% | 22.40% | |
| VAD B | Sales | |||
| Revenue, Major Customer [Line Items] | |||
| Significant customer, as a percentage | 19.60% | ||
| VAD B | Accounts Receivable | |||
| Revenue, Major Customer [Line Items] | |||
| Significant customer, as a percentage | 15.20% | 14.40% | |
| VAD C [Member] | Accounts Receivable | |||
| Revenue, Major Customer [Line Items] | |||
| Significant customer, as a percentage | 15.30% | ||