Note 5 - Concentration of Credit Risk (Details Textual) - USD ($) $ in Thousands |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Unsecured Loan Limit, Percentage of Shareholders' Equity, California Financial Code | 15.00% | |
| Secured and Unsecured Loan Limit Percentage, California Financial Code | 25.00% | |
| Loan Commitments Related to Real Estate Loans | $ 23,679 | $ 26,292 |
| Corporate Debt Securities [Member] | ||
| Concentration Risk, Issuer Relationships | 107 | |
| Concentration Risk, Aggregate Securities Amount | $ 5,000 | |
| Commercial Real Estate Loans [Member] | ||
| Loan To Value Ratio Requirement | 75.00% | |
| Residential Real Estate Loans [Member] | ||
| Loan To Value Ratio Requirement | 80.00% | |
| Aggregate Loans [Member] | Customer Concentration Risk [Member] | ||
| Concentration Risk, Issuer Relationships | 23 | |
| Aggregate Loans [Member] | Customer Concentration Risk [Member] | Minimum [Member] | ||
| Concentration Risk, Aggregate Loans Amount | $ 5,000 |