Note 15 - Related Party Transactions (Details Textual)					12 Months Ended
	Oct. 31, 2026 $ / item	Nov. 01, 2021 $ / item	Oct. 31, 2021 $ / item	Nov. 01, 2016 ft² $ / item	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Debt Instrument, Fair Value Adjustments					$ 0	$ 1,400,000	$ 1,700,000
Cash Contribution Committed to Charitable Foundation					1,000,000	3,000,000	1,000,000
District [Member]
Bond Receivable, Amount in Exchange of Land Development Improvement								$ 28,600,000
Debt Instrument, Cash Receipts					$ 0	$ 0	$ (1,200,000)
District [Member] | Capital Appreciation Bonds [Member]
Investment Owned, at Cost								22,500,000
District [Member] | Subordinate Bond [Member]
Investment Owned, at Cost								$ 1,600,000
Sublease Agreement [Member] | CVentures, Inc. [Member]
Area of Real Estate Property | ft²				5,437
Operating Leases, Yearly Rental Rate Per Rentable Square Foot | $ / item				26.5
Sublease Agreement [Member] | CVentures, Inc. [Member] | Scenario, Forecast [Member]
Operating Leases, Yearly Rental Rate Per Rentable Square Foot | $ / item	31.67	29.26	28.68