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Note 3 - Loans Receivable and Allowance for Loan Losses (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 USD ($) | Mar. 31, 2015 USD ($) | Dec. 31, 2015 USD ($)
Note 3 - Loans Receivable and Allowance for Loan Losses (Details) [Line Items] |  |  |
Loans and Leases Receivable, Gross | $ 485,183,000 |  | $ 484,369,000
Maximum Period of Credit Extension of Construction Loans | 18 months |  |
Period for Charged Off of Open-End Credits |  |  | 180 days
Period for Charged Off of Close-End Credits | 120 days |  |
Impaired Financing Receivable, Unpaid Principal Balance | $ 18,559,000 |  | $ 14,837,000
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans | $ 139,000 | $ 4,000 |
Maximum Period for Charged Off of Consumer Installment Loans | 90 days |  |
Number of Non-Accruing Loans | 5 |  |
Financing Receivable, Recorded Investment, Nonaccrual Status | $ 5,409,000 |  | 1,593,000
Impaired Financing Receivable, Related Allowance | 739,000 |  | 3,000
Impaired loans | $ 16,581,000 |  | $ 12,851,000
Financing Receivable, Modifications, Number of Contracts | 0 |  | 0
Loans and Leases Receivable, Impaired, Commitment to Lend | $ 0 |  | $ 0
Non-Accrual Loans [Member] |  |  |
Note 3 - Loans Receivable and Allowance for Loan Losses (Details) [Line Items] |  |  |
Impaired Financing Receivable, Unpaid Principal Balance | 5,400,000 |  | 1,600,000
Residential Portfolio Segment [Member] |  |  |
Note 3 - Loans Receivable and Allowance for Loan Losses (Details) [Line Items] |  |  |
Loans and Leases Receivable, Gross | 108,111,000 |  | 110,837,000
Impaired Financing Receivable, Unpaid Principal Balance | 5,538,000 |  | 5,559,000
Financing Receivable, Recorded Investment, Nonaccrual Status | 1,590,000 |  | 1,590,000
Impaired Financing Receivable, Related Allowance | 0 |  | 0
Impaired loans | 4,535,000 |  | 4,556,000
Residential Portfolio Segment [Member] | Reclassified from Commercial and Industrial Portfolio Segment [Member] |  |  |
Note 3 - Loans Receivable and Allowance for Loan Losses (Details) [Line Items] |  |  |
Loans and Leases Receivable, Gross |  |  | 28,200,000
Commercial Real Estate Portfolio Segment [Member] |  |  |
Note 3 - Loans Receivable and Allowance for Loan Losses (Details) [Line Items] |  |  |
Loans and Leases Receivable, Gross | $ 243,823,000 |  | 245,828,000
Maximum Percentage of Credit Extension Based on Market Value of Collateral | 75.00% |  |
Impaired Financing Receivable, Unpaid Principal Balance | $ 9,027,000 |  | 8,259,000
Financing Receivable, Recorded Investment, Nonaccrual Status | 840,000 |  | 0
Impaired Financing Receivable, Related Allowance | 0 |  | 0
Impaired loans | $ 8,521,000 |  | 7,745,000
Multi-family Real Estate [Member] |  |  |
Note 3 - Loans Receivable and Allowance for Loan Losses (Details) [Line Items] |  |  |
Maximum Percentage of Credit Extension Based on Market Value of Collateral | 80.00% |  |
Construction Portfolio Segment [Member] |  |  |
Note 3 - Loans Receivable and Allowance for Loan Losses (Details) [Line Items] |  |  |
Loans and Leases Receivable, Gross | $ 21,748,000 |  | 15,551,000
Percentage of Maximum Loan to Value | 75.00% |  |
Impaired Financing Receivable, Unpaid Principal Balance | $ 287,000 |  | 287,000
Financing Receivable, Recorded Investment, Nonaccrual Status |  |  | 0
Impaired Financing Receivable, Related Allowance | 0 |  | 0
Impaired loans | $ 0 |  | $ 0

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