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Accounts payable and accrued liabilities (Details Textual) (Common Stock [Member])
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12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2012
USD ($)
|
Dec. 31, 2012
CAD
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Dec. 31, 2011
|
|
| Accounts Payable And Accrued Liabilities [Line Items] | |||
| Issuance of stock for settlement of accounts payable (in shares) | 500,000 | 500,000 | 50,000 |
| Issuance of shares for settlement of accounts payable | $ 253,050 | 250,000 | |