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Note 2 - Investments (Details Textual)		3 Months Ended
Note 2 - Investments (Details Textual)	Nov. 04, 2022	Mar. 31, 2026 USD ($)	Jun. 30, 2025	Mar. 31, 2025 USD ($)	Dec. 31, 2025 USD ($)
Proceeds from Sale, Maturity and Collection of Investments		$ 2,813,005		$ 3,712,625
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions		206
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss		$ 4,768,730			$ 4,376,114
Financing Receivable, before Allowance for Credit Loss		26,360,660			23,744,155
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		515,248
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Principal Amount of Delinquent Loans		464,358
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		11
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		134,695
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		$ 329,393
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Number of Loans		4
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		122
Collateralized Mortgage-Backed Securities [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions		70
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss		$ 833,342			799,463
Term Loans [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions		6
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss		$ 181,390			$ 191,512
Preferred Stock [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions		8