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v3.19.1

Taxation (Detail Textuals) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Tax Expense [Line Items] |  |  |
Effective income tax rate | 0.00% | 0.00% | 0.00%
Value added tax percentage | 6.00% |  |
Percentage withholding income tax dividends distributed by foreign-invested entity ("FIE") | 10.00% |  |
Withholding tax rate lowered if foreign investor owns shares of FIE | 5.00% |  |
Percentage share of FIE own directly by foreign investor | 25.00% |  |
China | State Administration of Taxation, China |  |  |
Income Tax Expense [Line Items] |  |  |
Effective income tax rate | 25.00% |  |
Hong Kong | Inland Revenue, Hong Kong |  |  |
Income Tax Expense [Line Items] |  |  |
Effective income tax rate | 16.50% | 16.50% | 16.50%

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