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SIGNIFICANT CUSTOMERS AND GEOGRAPHIC NET REVENUES Customer and Credit Risk Concentration (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2017 USD ($) Customer | Sep. 30, 2016 USD ($) Customer | Sep. 30, 2017 USD ($) Customer | Sep. 30, 2016 USD ($) Customer | Dec. 31, 2016 Customer
Concentration Risk [Line Items] |  |  |  |  |
Net Revenues | $ | $ 111,255 | $ 101,625 | $ 323,506 | $ 287,232 |
Distributors |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Net Revenues | $ | $ 83,200 | $ 75,600 | $ 249,300 | $ 215,900 |
Sales Revenue, Goods, Net | Customer Concentration Risk |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Number of major customers | 1 | 1 | 1 | 2 |
Concentration risk percentage benchmark | 10.00% | 10.00% | 10.00% | 10.00% |
Sales Revenue, Goods, Net | Customer Concentration Risk | Avnet |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk, percentage of total net revenues | 15.00% | 18.00% | 16.00% | 20.00% |
Sales Revenue, Goods, Net | Customer Concentration Risk | Powertech Distribution Ltd. |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk, percentage of total net revenues |  |  |  | 11.00% |
Sales Revenue, Goods, Net | Customer Concentration Risk | Ten Customers |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Number of major customers | 10 | 10 | 10 | 10 |
Concentration risk, percentage of total net revenues | 56.00% | 60.00% | 55.00% | 61.00% |
Accounts Receivable | Credit Concentration Risk |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Number of major customers | 10 |  | 10 |  | 10
Concentration risk percentage benchmark for accounts receivable (more than) | 10.00% |  | 10.00% |  | 10.00%
Accounts Receivable | Credit Concentration Risk | Avnet |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage benchmark | 17.00% |  | 17.00% |  | 25.00%
Accounts Receivable | Credit Concentration Risk | Ten Customers |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage benchmark |  |  | 66.00% |  | 70.00%
Accounts Receivable | Credit Concentration Risk | ATM Electronic Corporation |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage benchmark |  |  |  |  | 13.00%

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