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Bank loans (Details Textual)	Dec. 31, 2017	Dec. 31, 2016
Bottom of range [member]
Disclosure Of Bank Loans [Line Items]
Borrowings, interest rate	1.15%	1.92%
Top of range [member]
Disclosure Of Bank Loans [Line Items]
Borrowings, interest rate	6.85%	4.14%

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- Definition

The interest rate on borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2017-01-01
-Paragraph 7
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-URIDate 2017-03-09

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