v3.26.1
Note 8 - Allowance for Loan Losses From Mortgage Loans on Real Estate - Mortgage Loan to Value Ratios (Details) - USD ($)
Jun. 30, 2026
Dec. 31, 2025
Mortgage loans on real estate $ 257,171,436 $ 250,899,714
Residential Portfolio Segment [Member]    
Mortgage loans on real estate 219,472,643 221,015,308
Commercial Portfolio Segment [Member]    
Mortgage loans on real estate 37,698,793 29,884,406
Loan to Value Range1 [Member]    
Mortgage loans on real estate 86,365,431 83,955,193
Loan to Value Range1 [Member] | Residential Portfolio Segment [Member]    
Mortgage loans on real estate 83,614,686 80,961,159
Loan to Value Range1 [Member] | Commercial Portfolio Segment [Member]    
Mortgage loans on real estate 2,750,745 2,994,034
Loan to Value Range 2 [Member]    
Mortgage loans on real estate 66,235,430 62,101,840
Loan to Value Range 2 [Member] | Residential Portfolio Segment [Member]    
Mortgage loans on real estate 59,847,321 57,882,384
Loan to Value Range 2 [Member] | Commercial Portfolio Segment [Member]    
Mortgage loans on real estate 6,388,109 4,219,456
Loan to Value Range 3 [Member]    
Mortgage loans on real estate 45,026,348 44,186,743
Loan to Value Range 3 [Member] | Residential Portfolio Segment [Member]    
Mortgage loans on real estate 37,086,795 41,230,931
Loan to Value Range 3 [Member] | Commercial Portfolio Segment [Member]    
Mortgage loans on real estate 7,939,553 2,955,812
Loan to Value Range 4 [Member]    
Mortgage loans on real estate 26,915,356 28,917,015
Loan to Value Range 4 [Member] | Residential Portfolio Segment [Member]    
Mortgage loans on real estate 19,790,519 20,034,515
Loan to Value Range 4 [Member] | Commercial Portfolio Segment [Member]    
Mortgage loans on real estate 7,124,837 8,882,500
Loan to Value Range 5 [Member]    
Mortgage loans on real estate 12,861,271 15,407,016
Loan to Value Range 5 [Member] | Residential Portfolio Segment [Member]    
Mortgage loans on real estate 8,275,609 10,765,292
Loan to Value Range 5 [Member] | Commercial Portfolio Segment [Member]    
Mortgage loans on real estate 4,585,662 4,641,724
Loan to Value Range 6 [Member]    
Mortgage loans on real estate 10,440,965 8,471,913
Loan to Value Range 6 [Member] | Residential Portfolio Segment [Member]    
Mortgage loans on real estate 6,001,339 5,555,166
Loan to Value Range 6 [Member] | Commercial Portfolio Segment [Member]    
Mortgage loans on real estate 4,439,626 2,916,747
Loan to Value Range 7 [Member]    
Mortgage loans on real estate 7,934,547 6,918,197
Loan to Value Range 7 [Member] | Residential Portfolio Segment [Member]    
Mortgage loans on real estate 3,712,765 3,899,780
Loan to Value Range 7 [Member] | Commercial Portfolio Segment [Member]    
Mortgage loans on real estate 4,221,782 3,018,417
Loan to Value Range 8 [Member]    
Mortgage loans on real estate 1,392,088 941,797
Loan to Value Range 8 [Member] | Residential Portfolio Segment [Member]    
Mortgage loans on real estate 1,143,609 686,081
Loan to Value Range 8 [Member] | Commercial Portfolio Segment [Member]    
Mortgage loans on real estate $ 248,479 $ 255,716