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Note 3 - Loans Receivable and Allowance for Loan Losses (Details Textual) | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2017 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2016 USD ($) | Dec. 31, 2016 USD ($)
Payments to Acquire Loans Receivable |  |  |  | $ 73,022,000 | $ 0 |
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 |  | $ 22,000 | $ 58,000 | $ 43,000 | $ 196,000 |
Threshold Period Past Due for Write-off of Financing Receivable |  |  |  | 90 days |  |
Maximum Period for Charged Off of Consumer Installment Loans |  |  |  | 180 days |  |
Performance Period Under Loan Terms |  |  |  | 6 years |  |
Financing Receivable, Modifications, Number of Contracts |  | 0 | 0 | 0 | 0 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts |  | 0 | 0 | 0 | 0 |
Loans and Leases Receivable, Impaired, Commitment to Lend |  | $ 0 |  | $ 0 |  | $ 0
Impaired Financing Receivable, Recorded Investment |  | 8,856,000 |  | 8,856,000 |  | 8,951,000
Impaired Financing Receivable, Related Allowance |  | $ 231,000 |  | $ 231,000 |  | 231,000
Number of Impaired Loans |  | 11 |  | 11 |  |
Non-Accrual Loans [Member] |  |  |  |  |  |
Impaired Financing Receivable, Interest Income, Cash Basis Method |  | $ 0 | $ 0 | $ 0 | $ 0 |
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Maximum Percentage of Credit Extension Based on Market Value of Collateral |  |  |  | 75.00% |  |
Impaired Financing Receivable, Recorded Investment |  | 6,142,000 |  | $ 6,142,000 |  | 6,267,000
Impaired Financing Receivable, Related Allowance |  |  |  |  |  |
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% |  |
Impaired Financing Receivable, Related Allowance |  |  |  |  |  |
Residential Portfolio Segment [Member] |  |  |  |  |  |
Payments to Acquire Loans Receivable | $ 73,000,000 |  |  |  |  |
Impaired Financing Receivable, Recorded Investment |  | 1,905,000 |  | 1,905,000 |  | 1,911,000
Impaired Financing Receivable, Related Allowance |  |  |  |  |  |
Construction to Permanent Portfolio Segment [Member] |  |  |  |  |  |
Impaired Financing Receivable, Related Allowance |  |  |  |  |  |
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 Portfolio Segment [Member] |  |  |  |  |  |
Proceeds from Insurance Settlement, Investing Activities | $ 2,800,000 |  |  |  |  |
Impaired Financing Receivable, Recorded Investment |  | 269,000 |  | $ 269,000 |  | 231,000
Impaired Financing Receivable, Related Allowance |  | $ 231,000 |  | $ 231,000 |  | $ 231,000

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 Maximum period for charged off of consumer installment loans. + References No definition available. + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524 + Details
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- Definition Amount of interest income recognized on a cash-basis method of accounting that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 + Details
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- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953550-111524 + Details
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- Definition Amount of allowance for credit losses related to recorded investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 + Details
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- Definition Reflects the unfunded portion of contractual agreements to lend funds to borrowers for loans whose terms have been modified by troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18794-111554 + 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18794-111554 + Details
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- Definition The cash outflow for the purchase of loan receivable arising from the financing of goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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