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Commitments and Contingencies - Restructuring Activities and Sale of Guangzhou Factory (Details) $ in Thousands, ¥ in Millions |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 26, 2018 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Apr. 26, 2018 USD ($) | Apr. 26, 2018 CNY (¥) | Apr. 23, 2018 USD ($) | Apr. 23, 2018 CNY (¥) | Sep. 26, 2016 CNY (¥)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Nonrefundable deposit |  |  |  |  | $ 5,100 | ¥ 34.0 |  |  |
Consideration receivable upon government approvals |  |  |  |  | 237,000 | 35.8 |  |  |
Escrow deposit |  |  |  |  | $ 10,300 | ¥ 68.0 |  |  |
Gain on sale of Guangzhou factory | $ 37,000 | $ 0 | $ 0 | $ 36,978 |  |  |  |  |
Net gain on disposal | $ 32,100 |  |  |  |  |  |  |  |
Guangzhou factory | Disposed of by sale |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Consideration received in sale |  |  |  |  |  |  | $ 51,400 | ¥ 339.0 | ¥ 320.0
Escrow deposit as percentage of purchase price |  |  |  |  |  |  |  |  | 10.00%

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