Significant accounting policies (Revenue recognition and accounts receivable) (Details) - Customer Concentration [Member] - Net Sales [Member] |
3 Months Ended |
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Mar. 31, 2015
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Concentration Risk [Line Items] | |
Number of customers | 3 |
Customer One [Member] | |
Concentration Risk [Line Items] | |
Risk percentage | 12.00% |
Customer Two [Member] | |
Concentration Risk [Line Items] | |
Risk percentage | 44.00% |
Customer Three [Member] | |
Concentration Risk [Line Items] | |
Risk percentage | 44.00% |
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- Definition Number of customers contributing to concentration risk during the period. No definition available.
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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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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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