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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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Percentage Share Of FIE Own By Foreign Investor.

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Withholding income tax dividends distributed by a foreign-invested entity ("FIE").

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319

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