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Accounts receivable (Details) (CAD) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Receivables [Abstract] |  |  |
Accounts receivable – trade | 59,309,000 | 118,509,000 |
Accounts receivable – holdbacks | 9,055,000 | 33,352,000 |
Income and other taxes receivable | 12,000 | 420,000 |
Accounts receivable – other | 1,801,000 | 714,000 |
Allowance for doubtful accounts (note 16(d)) | 0 | (185,000) | (210,000)
Total accounts receivable | 70,177,000 | 152,810,000 |
Accounts receivable – holdback percentage | 10.00% |  |
Accounts receivable – holdbacks, noncurrent | 0 | 2,597,000 |

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- Definition Amount due from customers, clients, or other third-parties, or arising from transactions not separately disclosed, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value. + References No definition available. + Details
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- Definition Amounts due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer) for goods or services (including trade receivables) that have been delivered or sold in the normal course of business. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 3 -Subparagraph a, b -Article 5 + Details
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