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Note 2 - Investments (Details Textual)	12 Months Ended
Note 2 - Investments (Details Textual)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2023 USD ($)	May 31, 2023 USD ($)	Jan. 01, 2023 USD ($)	Nov. 30, 2021 USD ($)
Debt Securities, Available-for-Sale	$ 110,955,697	$ 93,388,971	$ 110,955,697
Debt Securities, Available-for-Sale, Allowance for Credit Loss	0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	8,974,518	3,945,837
Other-than-Temporary Impairment Losses on Available-for-Sale Securities		0
Other Investments	8,898,409	4,722,137
Investment, Funding Available for Future Investment	$ 8,050,000.00
Number of Apartment Rental Units	70
Real Estate Investment Property, Accumulated Depreciation	$ 682,402	609,282
Depreciation, Nonproduction	179,277	169,199
Federal Home Loan Bank of Chicago [Member]
Other Investments	425,000	425,000
Notes Receivable [Member]
Other Investments	5,495,979	4,082,507
Privately Held Investments [Member]
Other Investments	2,197,232	214,630
Investment Request Amount	1,950,000			$ 1,950,000
Funds at Lloyds [Member]
Other Investments	819,198
Limited Partnership [Member]
Other Investments	1,734,622
SAFE Investment [Member]
Other Investments	250,000
Stocks [Member]
Other Investments	$ 212,610
Private Investment Fund [Member]
Other Investments						$ 10,000,000
Notes Issued on July 30, 2019 [Member]
Investment, Funding Available for Future Investment					$ 373,307
Financing Receivable, after Allowance for Credit Loss					0
Financing Receivable, Allowance for Credit Loss		0			$ 39,000
Notes Issued on July 30, 2019 [Member] \| Prime Rate [Member]
Loans Receivable, Basis Spread on Variable Rate	0.25%
Notes Issued on July 30, 2019 [Member] \| Minimum [Member]
Financing Receivable, Interest Rate	3.90%
Notes Issued on July 30, 2019 [Member] \| Minimum [Member] \| Prime Rate [Member]
Loans Receivable, Basis Spread on Variable Rate	4.00%
Notes Issued on July 30, 2019 [Member] \| Maximum [Member]
Financing Receivable, Interest Rate	8.25%
Residential Mortgage-Backed Securities [Member]
Debt Securities, Available-for-Sale	$ 32,928,128	19,288,540
Commercial Mortgage-Backed Securities [Member]
Debt Securities, Available-for-Sale	5,629,659	8,946,897
Fixed Income Securities [Member]
Debt Securities, Available-for-Sale, Allowance for Credit Loss	$ 0	0
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	221
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	203
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 8,974,518
Held-To-Maturity Securities, Amount On Deposit With Regulatory Authorities Or Banks	3,351,574	3,290,386
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	$ 1,135,905
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss		$ 4,706,405