Income taxes - Narrative (Details) - Internal Revenue Service (IRS) |
Dec. 31, 2015
USD ($)
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| Operating Loss Carryforwards [Line Items] | |
| Operating Loss Carryforwards | $ 17,903,000 |
| Subsidiary | |
| Operating Loss Carryforwards [Line Items] | |
| Operating Loss Carryforwards | $ 3,578,000 |
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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