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Note 8 - Leases (Details Textual) | 12 Months Ended |  |
--- | --- | --- | ---
Oct. 31, 2020 USD ($) ft² | Oct. 31, 2019 USD ($) | Oct. 31, 2018 USD ($) | Feb. 06, 2020 | Apr. 30, 2015 ft²
Operating Lease, Expense | $ 396,066 | $ 403,097 | $ 422,102 |  |
Operating Lease, Weighted Average Remaining Lease Term (Year) | 44 years 3 months 18 days |  |  |  |
Operating Lease, Weighted Average Discount Rate, Percent | 5.10% |  |  |  |
Operating Lease, Payments | $ 382,812 |  |  |  |
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | 1,462,817 |  |  |  |
Other Assets [Member] |  |  |  |  |
Operating Lease, Right-of-Use Asset | 1,265,194 |  |  |  |
Accounts Payable and Accrued Liabilities [Member] |  |  |  |  |
Operating Lease, Liability, Current | 332,329 |  |  |  |
Other Noncurrent Liabilities [Member] |  |  |  |  |
Operating Lease, Liability, Noncurrent | $ 946,653 |  |  |  |
Operating Lease for Office, Manufacturing and Warehouse Space in Plano, Texas [Member] |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² | 34,000 |  |  |  |
Operating Lease for Warehouse Space in Roanoke, Virginia [Member] |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² |  |  |  |  | 36,000
Lessee, Operating Lease, Term of Contract (Month) |  |  |  |  | 12 months
Lease Term, Extension, Term (Year) | 1 year |  |  |  |
Lessee, Operating Lease, Renewal Term (Month) |  |  |  | 36 months |
Operating Lease For Office Equipment [Member] |  |  |  |  |
Lessee, Operating Lease, Term of Contract (Month) | 60 months |  |  |  |

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