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Note 4 - Loan Receivables and Allowance for Loan and Lease Losses (Details Textual) | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net | $ 0 | $ 176,000 |
Deteriorated Loans Transferred in, Debt Securities, Accreditable Yield, Period Increase (Decrease), Total | 2,000 | 47,000 | $ 92,000
Payments to Acquire Loans Receivable | $ 32,785,000 | 54,604,000 | 47,074,000
Maximum Period of Credit Extension of Construction Loans (Month) | 1 year 180 days |  |
Loans Receivable, Term to Reset to FHLB Rate (Year) | 5 years |  |
Period for Charged Off of Open-End Credits (Day) | 180 days |  |
Period for Charged Off of Close-End Credits (Day) | 120 days |  |
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans | $ 904,000 | 302,000 | $ 503,000
Maximum Period for Charged Off of Consumer Installment Loans (Day) | 180 days |  |
Financing Receivable, Troubled Debt Restructuring | $ 15,886,000 | $ 10,953,000 |
Financing Receivable, Modifications, Number of Contracts | 6 | 2 | 0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts |  |  | 0
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | $ 0 | $ 0 |
Financing Receivable, Principal and Interest Deferred Payments | 232,400,000 |  |
Financing Receivable, Loans Remaining on Deferment | 52,600,000 |  |
Impaired Financing Receivable, Recorded Investment, Total | 24,400,000 | 19,600,000 |
Impaired Financing Receivable, Related Allowance | $ 1,400,000 | $ 1,500,000 |
Number of Impaired Loans | 26 | 27 |
Impaired Financing Receivable, Non-Performing Loans, Discount of Appraisal Value, Selling Costs, Percent | 8.00% |  |
Impaired Financing Receivable, Non-Performing Loans, Discount to Appraisal Value, Percent | 5.80% | 12.00% |
Impaired Financing Receivable, Change in Accounting Estimate, Reduction in Loan Charge-offs | $ 266,000 |  |
SBA Loans [Member] |  |  |
Percentage of Principal Balance Guaranteed | 75.00% |  |
Syndicated and Leveraged Loans [Member] |  |  |
Loans and Leases Receivable, Net Amount, Total | $ 55,000,000 | $ 71,500,000 |
Non-Accrual Loans [Member] |  |  |
Impaired Financing Receivable, Interest Income, Cash Basis Method, Total | 156,000 | 671,000 | $ 0
Financing Receivable, Troubled Debt Restructuring | $ 11,508,000 | 9,337,000 |
Commercial Real Estate Portfolio Segment [Member] |  |  |
Maximum Percentage of Credit Extension Based on Market Value of Collateral | 75.00% |  |
Financing Receivable, Troubled Debt Restructuring | $ 9,884,000 | $ 9,873,000 |
Financing Receivable, Modifications, Number of Contracts | 2 | 2 |
Multi-family Real Estate [Member] |  |  |
Maximum Percentage of Credit Extension Based on Market Value of Collateral | 80.00% |  |
Construction Portfolio Segment [Member] |  |  |
Percentage of Maximum Loan to Value | 75.00% |  |
Residential Portfolio Segment [Member] |  |  |
Payments to Acquire Loans Receivable | $ 17,900,000 | $ 47,300,000 |
Financing Receivable, Troubled Debt Restructuring | 928,000 | 393,000 |
Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Troubled Debt Restructuring | $ 1,074,000 | $ 687,000 |
Financing Receivable, Modifications, Number of Contracts | 3 |  |
Consumer Portfolio Segment [Member] | Education Loans [Member] |  |  |
Payments to Acquire Loans Receivable | $ 14,900,000 | $ 7,300,000 |
Construction to Permanent Portfolio Segment [Member] | Minimum [Member] |  |  |
Loans Receivable, Term (Year) | 20 years |  |
Construction to Permanent Portfolio Segment [Member] | Maximum [Member] |  |  |
Loans Receivable, Term (Year) | 25 years |  |
Commercial and Industrial Loans [Member] |  |  |
Loans and Leases Receivable, Net Amount, Total | $ 21,600,000 | 9,600,000 |
Commercial and Industrial Portfolio Segment [Member] |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net | 0 | 179,000 |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses | $ 0 | $ 0 |

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- Definition Reserve for loans impairments recorded after acquisition as a result of current information and events which result in it being probable that estimated cash flows will be less than previously expected or because actual cash flows are less than cash flows previously expected. This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that was acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121585399&loc=d3e13503-111538 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544 + Details
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- Definition The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and allowance for loan losses). This relates to loans not accounted for debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121585399&loc=d3e13503-111538 + Details
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- Definition The increase (decrease) in accreditable yield (the excess of the loan's cash flows expected to be collected over the investor's initial investment in the loan) for the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544 + Details
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