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Note 2 - Investments (Details Textual)		3 Months Ended	12 Months Ended
Note 2 - Investments (Details Textual)	Nov. 04, 2022	Mar. 31, 2025 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Proceeds from Sale, Maturity and Collection of Investments			$ 26,839,076	$ 29,657,388
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions			195
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss			$ 4,376,114	5,063,509
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions			34
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions			161
Financing Receivable, before Allowance for Credit Loss			$ 23,744,155	25,248,434
Nonaccrual Loans With Specific Allowance [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages		$ 1,000,000
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate	8.00%	5.00%
Financing Receivable, before Allowance for Credit Loss		$ 250,000
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Number of Loans		1
First Mortgage [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages			$ 265,283
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Interest Rate			6.95%
Past Due Loans, Term Past Due			630 days
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Principal Amount of Delinquent Loans			$ 755,663
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Write-down or Reserve, Amount			490,380
First Mortgage [Member] \| Real Estate Loan [Member]
Financing Receivable, Allowance for Credit Loss, Writeoff			490,380
First Mortgage [Member] \| Financial Asset, Past Due [Member]
Financing Receivable, before Allowance for Credit Loss			755,663
Second Mortgage [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Face Amount of Mortgages			550,514
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Principal Amount of Delinquent Loans			551,088
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Write-down or Reserve, Amount			$ 193,473
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Number of Loans			13
Second Mortgage [Member] \| Real Estate Loan [Member]
Financing Receivable, Allowance for Credit Loss, Writeoff			$ 193,473
Second Mortgage [Member] \| Mortgage Other Than REO Loans [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Principal Amount of Delinquent Loans			169,125
Second Mortgage [Member] \| Real Estate Owned Loans [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Principal Amount of Delinquent Loans			$ 381,963
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Number of Loans			6
Second Mortgage [Member] \| Financial Asset, Past Due [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Number of Loans			5
Fixed Income Securities [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions			111
Collateralized Mortgage-Backed Securities [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions			68
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss			$ 799,463	945,533
Term Loans [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions			9
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss			$ 191,512	$ 212,084
Preferred Stock [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions			7