Note 2 - Investments (Details Textual)	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	May 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Nov. 30, 2021 USD ($)
Debt Securities, Available-for-Sale	$ 99,100,422		$ 99,100,422			$ 93,388,971
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	12,607,384		12,607,384			3,945,837
Other-than-temporary Impairment Loss, Debt Securities, Available-for-Sale, Recognized in Earnings			0	$ 0
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	1,062,332		1,062,332
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	279,100		279,100
Equity Securities, FV-NI, Unrealized Gain (Loss)	(1,062,332)	$ (1,084,289)	279,100	$ (6,181,492)
Other Investments	7,512,170		7,512,170			4,722,137
Federal Home Loan Bank of Chicago [Member]
Other Investments	425,000		425,000			425,000
Notes Receivable [Member]
Other Investments	5,515,009		5,515,009			4,082,507
Privately Held Investments [Member]
Other Investments	1,572,162		1,572,162			214,630
Limited Partnership [Member]
Other Investments	1,107,132		1,107,132
SAFE Investment [Member]
Other Investments	250,000		250,000
Stocks [Member]
Other Investments	215,030		215,030
Private Investment Fund [Member]
Other Investments							$ 10,000,000
Investment Request Amount					$ 1,300,000
Investment, Funding Available for Future Investment	8,700,000		8,700,000
Notes Issued on July 30, 2019 [Member]
Debt Instrument Accumulated Payments Received	33,608		33,608			244,046
Financing Receivable, after Allowance for Credit Loss	8,025		8,025			10,496
Financing Receivable, Allowance for Credit Loss	$ 39,000		$ 39,000			0
Notes Issued on July 30, 2019 [Member] | Prime Rate [Member]
Loans Receivable, Basis Spread on Variable Rate	0.25%		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%		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	$ 7,261,802		$ 7,261,802			10,567,904
Residential Mortgage-Backed Securities [Member]
Debt Securities, Available-for-Sale	28,268,594		28,268,594			19,288,540
Commercial Mortgage-Backed Securities [Member]
Debt Securities, Available-for-Sale	6,123,034		6,123,034			8,946,897
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	260		260
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions	204		204
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 12,607,384		$ 12,607,384