Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Fair Value - Valuation Techniques (Details)

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Note 4 - Fair Value - Valuation Techniques (Details) - Collateral Pledged [Member]
$ in Millions
Mar. 31, 2024
USD ($)
Dec. 31, 2023
Loans, fair value $ 0.3  
Loans receivable, measurement input   303
Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member] | Minimum [Member]    
Loans receivable, measurement input 0.02 0.02
Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member] | Maximum [Member]    
Loans receivable, measurement input 0.41 0.41
Measurement Input, Comparability Adjustment [Member] | Valuation, Market Approach [Member] | Weighted Average [Member]    
Loans receivable, measurement input 0.377 0.375
Measurement Input, Cap Rate [Member] | Valuation, Income Approach [Member] | Minimum [Member]    
Loans receivable, measurement input 0.075 0.075
Measurement Input, Cap Rate [Member] | Valuation, Income Approach [Member] | Maximum [Member]    
Loans receivable, measurement input 0.085 0.085
Measurement Input, Cap Rate [Member] | Valuation, Income Approach [Member] | Weighted Average [Member]    
Loans receivable, measurement input 0.084 0.084