Income taxes - Change in Valuation Allowance (Details) $ in Thousands |
12 Months Ended |
|---|---|
|
Dec. 31, 2016
USD ($)
| |
| Income taxes | |
| Increase in valuation allowance | $ 8,182 |
| Valuation allowance, net tax expense relating to continuing operation | 10,107 |
| Valuation allowance, foreign currency translation adjustments | $ 1,925 |
| X | ||||||||||
- Definition Amount of decrease in the valuation allowance for a foreign currency translation adjustments, deferred tax asset. No definition available.
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| X | ||||||||||
- Definition Amount of increase in the valuation allowance for a net tax expenses relating to continuing operations, deferred tax asset. No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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