Financial instruments - Foreign Exchange Risk (Details) - $ / £ |
Jun. 30, 2016 |
Dec. 31, 2015 |
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| Financial instruments | ||
| Exchange rate | 1.3368 | 1.4825 |
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- Definition Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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