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Financial instruments (Details) (CAD)	12 Months Ended
Financial instruments (Details) (CAD)	Dec. 31, 2012	Dec. 31, 2011
Financial Instruments Details
Balance, start of the year fair value of derivative instruments
Value attributed to US$ common share purchase warrants issued in 2012 Financings	409,143
Change in fair value during the year	(168,143)
Net fair value of derivative instruments	241,000

Fair value of derivative asset, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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