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Note 4 - Loans Receivable and Allowance for Loan and Lease Losses (Details Textual) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2018 USD ($)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net | $ 439,000 |  |
Deteriorated Loans Transferred in, Debt Securities, Accreditable Yield, Period Increase (Decrease), Total | 25,000 |  |
Payments to Acquire Loans Receivable | $ 4,804,000 |  |
Maximum Period of Credit Extension of Construction Loans | 1 year 180 days |  |
Loans Receivable, Term to Reset to FHLB Rate | 5 years |  |
Period for Charged Off of Open-End Credits | 180 days |  |
Period for Charged Off of Close-End Credits | 120 days |  |
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans | $ 275,000 | $ 81,000 |
Maximum Period for Charged Off of Consumer Installment Loans | 180 days |  |
Financing Receivable, Troubled Debt Restructuring | $ 10,855,000 |  | $ 2,066,000
Financing Receivable, Modifications, Number of Contracts | 6 | 0 | 5
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts |  | 0 |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | $ 0 |  | $ 0
Impaired Financing Receivable, Recorded Investment, Total | 30,000,000 |  | 21,200,000
Impaired Financing Receivable, Related Allowance | $ 1,600,000 |  | $ 1,500,000
Number of Impaired Loans | 29 |  | 25
Non-Accrual Loans [Member] |  |  |
Impaired Financing Receivable, Interest Income, Cash Basis Method, Total | $ 150,000 | $ 0 |
Financing Receivable, Troubled Debt Restructuring | $ 8,800,000 |  |
Financing Receivable, Modifications, Number of Contracts | 1 |  |
Commercial Real Estate Portfolio Segment [Member] |  |  |
Maximum Percentage of Credit Extension Based on Market Value of Collateral | 75.00% |  |
Financing Receivable, Troubled Debt Restructuring | $ 1,073,000 |  | $ 1,081,000
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% |  |
Financing Receivable, Troubled Debt Restructuring | $ 8,800,000 |  |
Financing Receivable, Modifications, Number of Contracts | 1 |  |
Financing Receivable, Troubled Debt Restructuring, Postmodification | $ 8,800,000 |  |
Residential Portfolio Segment [Member] |  |  |
Payments to Acquire Loans Receivable | 4,800,000 | 0 |
Financing Receivable, Troubled Debt Restructuring | $ 292,000 |  | $ 296,000
Financing Receivable, Modifications, Number of Contracts | 1 |  | 1
Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Troubled Debt Restructuring | $ 690,000 |  | $ 689,000
Financing Receivable, Modifications, Number of Contracts | 2 |  | 2
Consumer Portfolio Segment [Member] | Education Loans [Member] |  |  |
Payments to Acquire Loans Receivable | $ 0 | $ 0 |
Construction to Permanent Portfolio Segment [Member] | Minimum [Member] |  |  |
Loans Receivable, Term | 20 years |  |
Construction to Permanent Portfolio Segment [Member] | Maximum [Member] |  |  |
Loans Receivable, Term | 25 years |  |
Commercial and Industrial Portfolio Segment [Member] |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net | $ 439,000 |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses | $ 0 |  |

X
- Definition Period of time between issuance and maturity of loan receivable, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Period of time that a loan receivable takes to reset to the FHLB rate, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Maximum percentage of credit extension based on market value of collateral. + References No definition available. + Details
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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=118938799&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=118939070&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=118939070&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=118938799&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=118939070&loc=d3e15032-111544 + Details
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- Definition Amount of allowance for credit losses related to recorded investment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524 + Details
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- Definition Reflects the amount of additional interest income that would have been recorded if impaired or nonperforming loans were instead current, in compliance with their original terms, and outstanding throughout the reporting period or since origination (if held for part of the period). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118939409&loc=d3e18794-111554 + Details
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