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Income Tax - Schedule of Loss (Income) Before Income Taxes (Details) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019
Income Tax Disclosure [Line Items] |  |
Loss (income) before income taxes | $ 128,617 | $ 83,274
Cayman |  |
Income Tax Disclosure [Line Items] |  |
Loss (income) before income taxes | 591 | (189)
PRC |  |
Income Tax Disclosure [Line Items] |  |
Loss (income) before income taxes | 112,320 | 76,299
HK |  |
Income Tax Disclosure [Line Items] |  |
Loss (income) before income taxes | 4,983 | 3,109
US |  |
Income Tax Disclosure [Line Items] |  |
Loss (income) before income taxes | 10,336 | 4,047
AUST |  |
Income Tax Disclosure [Line Items] |  |
Loss (income) before income taxes | $ 387 | $ 8

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