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Stock options (Tables) | 12 Months Ended
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Oct. 31, 2012
Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract] |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | The fair value of each option granted in 2012 and 2011 was estimated on the date of grant using the Black-Scholes option-pricing model with the following assumptions:
|  | 2012 |  |  | 2011 |
Expected volatility |  |  | 46.6%-66.2 | % |  |  | 35.9%-55.8 | %
Weighted-average volatility |  |  | 57.7 | % |  |  | 52.7 | %
Expected dividends |  |  | 3.0%-5.0 | % |  |  | 1.9%-6.3 | %
Expected term (in years) |  |  | 3.5-4.2 |  |  |  | 2.5-3.5 |
Risk-free interest rate |  |  | 0.3%-0.4 | % |  |  | 0.7%-1.2 | %
Weighted average fair market value of options granted during the year |  | $ | 1.19 |  |  | $ | 0.89 |
Weighted average fair market value of options vested during the year |  | $ | 1.02 |  |  | $ | 0.94
Schedule of Stock Options Roll Forward | Additional information regarding all of the Company's outstanding stock options at October 31, 2011 and 2010 and changes in outstanding stock options in 2011 and 2010 follows:
|  | 2012 |  |  | 2011 |
|  | Shares or Price Per Share |  |  | Weighted Average Exercise Price |  |  | Shares or Price Per Share |  |  | Weighted Average Exercise Price |
Options outstanding at beginning of year |  |  | 2,099,672 |  |  | $ | 2.13 |  |  |  | 2,454,952 |  |  | $ | 2.00 |
Options granted |  |  | 114,815 |  |  |  | 3.86 |  |  |  | 178,009 |  |  |  | 3.24 |
Options exercised |  |  | (192,738 | ) |  |  | 1.82 |  |  |  | (517,817 | ) |  |  | 1.90 |
Options forfeited |  |  | (16,968 | ) |  |  | 3.05 |  |  |  | (15,472 | ) |  |  | 2.70 |
Options outstanding at end of year |  |  | 2,004,781 |  |  | $ | 2.25 |  |  |  | 2,099,672 |  |  | $ | 2.13 |
Options exercisable at end of year |  |  | 1,650,289 |  |  | $ | 2.16 |  |  |  | 1,599,095 |  |  | $ | 2.00 |
Options vested and expected to vest at end of year |  |  | 1,987,333 |  |  | $ | 2.25 |  |  |  | 2,070,866 |  |  | $ | 2.02 |
Option price range at end of year |  | $ | 0.05 - $4.12 |  |  |  |  |  |  | $ | 0.05 - $3.78 |  |  |  |  |
Aggregate intrinsic value of options exercised during year |  | $ | 396,976 |  |  |  |  |  |  | $ | 693,490 |

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the change in stock options. + References No definition available. + Details
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