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Income taxes (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2014
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| UNITED STATES | |
| Deferred Tax Assets, Operating Loss Carryforwards, Foreign |
$ 93,338us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign / us-gaap_StatementGeographicalAxis = country_US |
| CANADA | |
| Deferred Tax Assets, Operating Loss Carryforwards, Domestic |
$ 27,732us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic / us-gaap_StatementGeographicalAxis = country_CA |
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign operating loss carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Details
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