Note 10 - Commitments and Contingencies (Details Textual)  | 
Mar. 31, 2022  | 
|---|---|
| First Mortgage Loans [Member] | One To Four Family Residential [Member] | |
| Financing Receivable, Minimum Percentage of Loan-to-value Ratio, Requires Mortgage Insurance | 80.00% | 
| X | ||||||||||
- Definition The minimum percentage of loan-to-value ratio that requires mortgage insurance on financing receivable. No definition available. 
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| X | ||||||||||
- Details 
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| X | ||||||||||
- Details 
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