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Summary of Significant Accounting Policies - Additional Information (Detail) - $ / $	1 Months Ended	12 Months Ended
	Feb. 28, 2018	Dec. 31, 2017
Summary Of Significant Accounting Policies [Abstract]
Income tax on unappropriated earnings	5.00%	10.00%
Convenience exchange rate		29.64

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- Definition

Income tax rate on unappropriated earnings

+ References

No definition available.

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- Definition

Summary Of Significant Accounting Policies [abstract]

+ References

No definition available.

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- Definition

The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2017-03-09

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