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Note 8 - Leases (Details Textual) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 30, 2015 ft² | Aug. 31, 2008 ft² | Oct. 31, 2017 USD ($) ft² | Oct. 31, 2016 USD ($) | Oct. 31, 2015 USD ($)
Operating Leases, Rent Expense, Net | $ |  |  | $ 403,178 | $ 391,116 | $ 479,937
Operating Lease for Office, Manufacturing and Warehouse Space in Plano, Texas [Member] |  |  |  |  |
Area of Real Estate Property |  |  | 34,000 |  |
Operating Lease for Office and Manufacturing Space in Coppell, Texas [Member] | Centric Solutions LLC [Member] |  |  |  |  |
Area of Real Estate Property |  | 23,000 |  |  |
Lessee, Operating Lease, Term of Contract |  | 7 years |  |  |
Operating Lease for Warehouse Space in Roanoke, Virginia [Member] |  |  |  |  |
Area of Real Estate Property | 36,000 |  |  |  |
Lessee, Operating Lease, Term of Contract | 1 year |  |  |  |
Lease Term, Extension, Term |  |  | 1 year |  |
Lease Term, Extension, Remaining Number |  |  | 2 |  |

X
- Definition The remaining number of available extensions to a lease term. + References No definition available. + Details
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X
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X
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X
- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717 + Details
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