Note 7 - Real Estate Development (Details Textual)		3 Months Ended				9 Months Ended
	Jan. 25, 2022 USD ($)	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 20, 2024 a ft²	Dec. 31, 2023 USD ($)	Dec. 12, 2023 USD ($)	Dec. 31, 2021 USD ($)	Dec. 21, 2021 USD ($)	Sep. 30, 2020 a	Jul. 01, 2020	Jun. 16, 2020 a	Sep. 27, 2018 a
Income (Loss) from Equity Method Investments		$ (1,374,401)	$ (1,174,499)	$ (852,247)	$ (674,341)	$ (3,401,147)	$ 561,991
Investee Losses in Excess of Equity Investment		4,003,146				4,003,146			$ 1,464,218
Proceeds from Equity Method Investment, Distribution, Return of Capital						19,158	0
Gain (Loss) on Transfer/Sale of Land		1,732,353			0	1,732,353	6,489,976
TIF Improvement Costs											$ 23,336,500
Estimated Cost of Tax Increment Financing Eligible Improvements, Expected Reduction	$ 5,744,000
Estimated Cost of Tax Increment Financing Eligible Improvements, Maximum Principle	$ 17,592,881
Income Taxes Receivable, Noncurrent		16,969,097				16,969,097			13,972,875
State and Local Jurisdiction [Member]
Income Taxes Receivable, Noncurrent		16,969,000				16,969,000			13,973,000
Income Tax Receivable Principal		13,793,000				13,793,000			11,307,000
Income Tax Receivable Interest		3,176,000				3,176,000			2,666,000
Indemnity Agreement [Member]
Debt Instrument, Maximum Reimbursement and Indemnification Amount		7,000,000				7,000,000				$ 7,000,000		$ 5,000,000
Doran Canterbury I Joint Venture [Member]
Area of Land (Acre) | a																13
Equity Method Investment, Ownership Percentage																27.40%
Income (Loss) from Equity Method Investments		(927,000)			(650,000)	(2,539,000)	636,000
Investee Losses in Excess of Equity Investment		4,003,000				4,003,000			$ 1,464,000
Doran Canterbury II [Member]
Area of Land (Acre) | a													10
Equity Method Investment, Ownership Percentage													27.40%
Income (Loss) from Equity Method Investments		(364,000)				(781,000)
Canterbury DBSV [Member]
Area of Land (Acre) | a															13
Equity Method Investment, Ownership Percentage														61.87%
Income (Loss) from Equity Method Investments		(84,000)			$ (24,000)	(81,000)	$ (76,000)
Proceeds from Equity Method Investment, Distribution, Return of Capital		$ 6,000				$ 19,000
Trackside Investments, LLC [Member]
Area of Land (Acre) | a								3.5
Equity Method Investment, Ownership Percentage								50.00%
Area of Real Estate Property (Square Foot) | ft²								16,000
Equity Method Investment, Annual Preferred Return Percentage		6.00%				6.00%
Gain (Loss) on Transfer/Sale of Land						$ 1,732,000