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Commitments and Contingencies (Details) (Ontario Grant [Member], CAD)
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12 Months Ended | |
|---|---|---|
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Oct. 31, 2012
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Oct. 31, 2011
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Ontario Grant [Member]
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| Gain Contingencies [Line Items] | ||
| Grant amount | 25,000,000 | |
| Grant period | November 1, 2010 to October 31, 2015 | |
| Annual disbursements | 5,000,000 | |
| Benefit recorded to date | 5,600,000 | 5,300,000 |
| Grants receivable | 2,500,000 | 300,000 |