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Note 2 - Investments (Details Textual)	3 Months Ended
Note 2 - Investments (Details Textual)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Mar. 31, 2023 USD ($)	Nov. 30, 2021 USD ($)
Debt Securities, Available-for-Sale	$ 109,168,285	$ 110,955,697
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	9,516,055	8,974,518
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	1,273,890		$ 639,418
Other Investments	9,040,528	8,898,409
Financing Receivable, Allowance for Credit Loss	39,000		39,000
Investment, Funding Available for Future Investment	$ 8,050,866	8,050,866
Investment, Variable Interest Rate, Type [Extensible Enumeration]	Prime Rate [Member]
Federal Home Loan Bank of Chicago [Member]
Other Investments	$ 425,000
Notes Receivable [Member]
Other Investments	5,420,520	5,495,978
Privately Held Investments [Member]
Other Investments	2,414,810	2,197,232
Funds at Lloyds [Member]
Other Investments	819,198	819,198
Limited Partnership [Member]
Other Investments	1,950,380	1,734,622
SAFE Investment [Member]
Other Investments	250,000	250,000
Stocks [Member]
Other Investments	214,430	212,610
Private Investment Fund [Member]
Other Investments				$ 10,000,000
Investment Request Amount	1,949,134	1,949,134
Notes Issued on July 30, 2019 [Member]
Financing Receivable, Allowance for Credit Loss	39,000
Investment, Funding Available for Future Investment	$ 75,458
Loans Receivable, Basis Spread on Variable Rate	0.25%
Financing Receivable, after Allowance for Credit Loss	$ 0
Notes Issued on July 30, 2019 [Member] \| Minimum [Member]
Financing Receivable, Interest Rate	3.90%
Loans Receivable, Basis Spread on Variable Rate	4.00%
Notes Issued on July 30, 2019 [Member] \| Maximum [Member]
Financing Receivable, Interest Rate	8.25%
Asset-Backed Securities [Member]
Debt Securities, Available-for-Sale	$ 8,192,160	8,462,540
Residential Mortgage-Backed Securities [Member]
Debt Securities, Available-for-Sale	32,154,992	32,928,128
Commercial Mortgage-Backed Securities [Member]
Debt Securities, Available-for-Sale	5,487,334	5,629,659
Fixed Income Securities [Member]
Debt Securities, Available-for-Sale, Allowance for Credit Loss	$ 0	$ 0	$ 0
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions	219
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	192
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 9,516,055