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Note 7 - Leases (Details Textual)	3 Months Ended	6 Months Ended
	Apr. 30, 2020 USD ($) ft²	Apr. 30, 2020 USD ($) ft²	Feb. 06, 2020	Apr. 30, 2015 ft²
Operating Lease, Expense	$ 98,558	$ 194,429
Operating Lease, Weighted Average Remaining Lease Term (Month)	49 months 27 days	49 months 27 days
Operating Lease, Weighted Average Discount Rate, Percent	5.10%	5.10%
Operating Lease, Payments	$ 95,251	$ 189,450
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability		1,462,817
Other Assets [Member]
Operating Lease, Right-of-Use Asset	1,432,098	1,432,098
Accounts Payable and Accrued Liabilities [Member]
Operating Lease, Liability, Current	322,955	322,955
Other Noncurrent Liabilities [Member]
Operating Lease, Liability, Noncurrent	$ 1,114,655	$ 1,114,655
Operating Lease for Office, Manufacturing and Warehouse Space in Plano, Texas [Member]
Area of Real Estate Property (Square Foot) | ft²	34,000	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	60 months

X

- Definition

Represents the extension of a term lease by the additional years added.

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Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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-SubTopic 20
-Section 50
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Amount of operating lease expense. Excludes sublease income.

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Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

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Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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Amount of lessee's right to use underlying asset under operating lease.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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