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Shareholders' Equity (Detail) - Stock Option Activity (USD $)
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12 Months Ended | 12 Months Ended | 12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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Jan. 31, 2013
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Jan. 31, 2012
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Oct. 31, 2011
Share 2000 Plan [Member]
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Oct. 31, 2012
Share 2000 Plan [Member]
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Oct. 31, 2010
Share 2000 Plan [Member]
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Oct. 31, 2012
Share 2003 Plan [Member]
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Oct. 31, 2011
Share 2003 Plan [Member]
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Oct. 31, 2010
Share 2003 Plan [Member]
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Oct. 31, 2012
Share 2010 Plan [Member]
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Oct. 31, 2011
Share 2010 Plan [Member]
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Oct. 31, 2010
Share 2010 Plan [Member]
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| Options Outstanding, Shares | 870,466 | 16,350,045 | 18,112,045 | 2,820,000 | 1,050,000 | 1,035,000 | |||||
| Options Outstanding, Weighted Average Exercise Price Per Share (in Dollars per share) | $ 0.66 | $ 0.715 | $ 0.80 | $ 0.248 | $ 0.31 | $ 0.21 | |||||
| Options Outstanding, Aggregate Intrinsic Value (in Dollars) | $ 0 | $ 148,000 | $ 222,000 | $ 109,730 | |||||||
| Options Exercisable, Shares | 16,290,045 | 1,928,750 | |||||||||
| Options Exercisable, Weighted Average Exercise Price Per Share (in Dollars per share) | $ 0.718 | $ 0.261 | |||||||||
| Options Exercisable, Aggregate Intrinsic Value (in Dollars) | 211,000 | 73,346 | |||||||||
| Expired, Share | (870,466) | (60,000) | |||||||||
| Expired, Weighted Average Exercise Price Per Share (in Dollars per share) | $ 0.66 | $ 0.59 | |||||||||
| Exercised, Shares | (500,000) | (1,290,000) | (5,120,000) | ||||||||
| Exercised, Weighted Average Exercise Price Per Share (in Dollars per share) | $ 0.25 | $ 0.16 | $ 0.23 | ||||||||
| Options Outstanding and Exercisable, Share | 0 | 17,552,045 | |||||||||
| Options Outstanding and Exercisable, Weighted Average Exercise Price Per Share (in Dollars per share) | $ 0 | $ 0.81 | |||||||||
| Options Outstanding and Exercisable, Aggregate Intrinsic Value (in Dollars) | $ 0 | ||||||||||
| Granted, Shares | 60,000 | 3,060,000 | 5,135,000 | ||||||||
| Granted, Weighted Average Exercise Price Per Share (in Dollars per share) | $ 0.072 | $ 0.19 | $ 0.25 | ||||||||
| Forfeited | (195,000) | ||||||||||
| Cancelled | (1,067,000) | ||||||||||
| Cancelled (in Dollars per share) | $ 0.86 | ||||||||||