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Income taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2013
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U.S. [Member] |
Operating Loss and Tax Credit Carryforwards [Line Items] |
Net operating loss carryforwards | $ 0.9
Non-U.S. [Member] |
Operating Loss and Tax Credit Carryforwards [Line Items] |
Net operating loss carryforwards | $ 4.5

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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
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