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Dividends declaration - Additional Information (Detail) (USD $) | 12 Months Ended
--- | ---
Oct. 31, 2012 | Oct. 31, 2011
Dividends Payable [Line Items] |  |
Dividends paid, per share | $ 0.05 |
Dividends Paid | $ 1,386,751 | $ 2,528,971
Dividend One |  |
Dividends Payable [Line Items] |  |
Dividends paid, per share |  | $ 0.015
Dividend Two |  |
Dividends Payable [Line Items] |  |
Dividends paid, per share |  | $ 0.02
Dividend Three |  |
Dividends Payable [Line Items] |  |
Dividends paid, per share |  | $ 0.025
Dividend Four |  |
Dividends Payable [Line Items] |  |
Dividends paid, per share |  | $ 0.05
Dividend Five |  |
Dividends Payable [Line Items] |  |
Dividends paid, per share |  | $ 0.25

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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770 + Details
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- Definition Cash outflow in the form of ordinary dividends to common shareholders, generally out of earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585 + Details
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