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Inventories, Net and Significant Supplier - Purchases from Significant Supplier (Details) - Texas Instrument - Cost of goods - Related party supplier - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Concentration Risk [Line Items] |  |  |  |
Purchases from significant supplier | $ 11,450 | $ 11,437 | $ 20,578 | $ 19,941
Concentration risk percentage | 11.00% | 11.80% | 10.70% | 11.30%

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