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Summary of Significant Accounting Policies (Detail) - Weighted average assumptions estimated fair value of stock options (USD $)
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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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| Weighted average fair value at grant date (in Dollars per share) | $ 0.18 | $ 0.15 |
| Expected term (in years) | 5 years 9 months | 3 years 109 days |
| Expected volatility | 109.00% | 107.00% |
| Risk-free interest rate | 1.16% | 0.88% |
| Expected dividend yield | 0.00% | 0.00% |
| X | ||||||||||
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- Definition
Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Risk-free interest rate assumption used in valuing an instrument. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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