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Note 4 - Loans Receivable (Details Textual) | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Loans and Leases Receivable, Gross | $ 1,233,287,000 | $ 1,050,638,000
Reserve for Uncollected Loan Interest | 38,000 | 140,000
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | $ 0 | $ 0
Financing Receivable, Modifications, Number of Contracts | 0 | 0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | 0 | 0
Equipment Finance Portfolio [Member] |  |
Loans and Leases Receivable, Gross | $ 455,700,000 |
Small Business Equipment Finance [Member] | Credit Exposure To 529 Obligors [Member] |  |
Loans and Leases Receivable, Gross | $ 34,800,000 |
Residential Mortgage [Member] | First Mortgage [Member] |  |
Percent Threshold On Loan To Value Ratios Requiring Private Mortgage Insurance | 80.00% |
Nonresidential Real Estate Loans [Member] |  |
Projected Cash Flow To Loan Debt Service Requirement | 120.00% |
Nonresidential Real Estate Loans [Member] | Fixed Rate Nonresidential Mortgage [Member] |  |
Loans and Leases Receivable, Amortization Period (Year) | 15 years |
U.S. Government 31 Departments or Agencies [Member] | Equipment Finance Portfolio [Member] |  |
Loans and Leases Receivable, Gross | $ 140,800,000 |
U.S. Government 31 Departments or Agencies [Member] | Equipment Finance Portfolio [Member] | Ten Largest Exposures [Member] |  |
Loans and Leases Receivable, Gross | 113,300,000 |
Seventy Six State or Local Governments [Member] | Equipment Finance Portfolio [Member] |  |
Loans and Leases Receivable, Gross | 70,700,000 |
Seventy Six State or Local Governments [Member] | Equipment Finance Portfolio [Member] | Ten Largest Exposures [Member] |  |
Loans and Leases Receivable, Gross | 43,100,000 |
Middle-market Obligors and 214 Corporate [Member] | Commercial Equipment Finance [Member] |  |
Loans and Leases Receivable, Gross | 209,400,000 |
Middle-market Obligors and 214 Corporate [Member] | Commercial Equipment Finance [Member] | Ten Largest Exposures [Member] |  |
Loans and Leases Receivable, Gross | 60,900,000 |
Commercial leases [Member] |  |
Loans and Lease Receivables Outstanding Credit Exposure, Average Amount | $ 776,000 |
Minimum [Member] | Nonresidential Real Estate Loans [Member] |  |
Mortgage Loans on Real Estate, Maturity (Year) | 3 years |
Loans and Leases Receivable, Balloon Maturity (Year) | 3 years |
Loans and Leases Receivable, Amortization Period (Year) | 20 years |
Maximum [Member] | Multi Family Mortgage Loans [Member] |  |
Loan Amount To Appraised Value Of Property Securing Loan, Percentage | 80.00% |
Maximum [Member] | Nonresidential Real Estate Loans [Member] |  |
Mortgage Loans on Real Estate, Maturity (Year) | 5 years |
Loans and Leases Receivable, Balloon Maturity (Year) | 5 years |
Loans and Leases Receivable, Amortization Period (Year) | 30 years |
Maximum [Member] | Equipment Finance [Member] |  |
Commercial Leases Maturity (Year) | 5 years |
Maximum [Member] | Commercial leases [Member] |  |
Loans And Lease Receivables, Outstanding Credit Exposure | $ 15,000,000 |
Weighted Average [Member] | Small Business Equipment Finance [Member] | Credit Exposure To 529 Obligors [Member] |  |
Loans and Leases Receivable, Gross | 66,000 |
Weighted Average [Member] | U.S. Government 31 Departments or Agencies [Member] | Equipment Finance Portfolio [Member] | Ten Largest Exposures [Member] |  |
Loans and Leases Receivable, Gross | 4,500,000 |
Weighted Average [Member] | Seventy Six State or Local Governments [Member] | Equipment Finance Portfolio [Member] | Ten Largest Exposures [Member] |  |
Loans and Leases Receivable, Gross | 930,000 |
Weighted Average [Member] | Middle-market Obligors and 214 Corporate [Member] | Commercial Equipment Finance [Member] | Ten Largest Exposures [Member] |  |
Loans and Leases Receivable, Gross | $ 979,000 |
Collateralized Loan [Member] | Multi Family Mortgage Loans [Member] |  |
Collateralized Loan Receivable, Percentage Of Collateral Located Outside Primary Market Area | 45.00% |
Projected Cash Flow To Loan Debt Service Requirement | 120.00% |
Collateralized Loan [Member] | Minimum [Member] | Multi Family Mortgage Loans [Member] |  |
Loans and Leases Receivable, Gross | $ 500,000 |
Collateralized Loan [Member] | Minimum [Member] | Nonresidential Real Estate Loans [Member] |  |
Loans and Leases Receivable, Gross | 500,000 |
Collateralized Loan [Member] | Maximum [Member] | Multi Family Mortgage Loans [Member] |  |
Loans and Leases Receivable, Gross | 8,500,000 |
Collateralized Loan [Member] | Maximum [Member] | Nonresidential Real Estate Loans [Member] |  |
Loans and Leases Receivable, Gross | $ 7,500,000 |

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