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Commitments and Contingencies - Restructuring Activities and Sale of Guangzhou Factory (Details) $ in Thousands, ¥ in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Sep. 26, 2016 CNY (¥) | Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Factory transition restructuring charges |  | $ 449 | $ 84 | $ 5,699 | $ 1,517
Guangzhou Factory | Disposed of by sale |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Consideration | ¥ 320 | 47,200 |  | 47,200 |
Period to cease operations (up to) | 24 months |  |  |  |
Expected term of completion | 28 months |  |  |  |
Escrow deposit as percentage of purchase price | 10.00% |  |  |  |
Employee severance | Manufacturing activities transition |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Additional restructuring expenses expected to be incurred |  | 1,500 |  | 1,500 |
Employee severance | Manufacturing activities transition | Accrued compensation |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Unpaid severance costs |  | $ 200 |  | 200 |
Employee severance | Manufacturing activities transition | Selling, general and administrative expenses |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Factory transition restructuring charges |  |  |  | $ 5,700 | $ 1,500

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