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Note 4 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Past Due and Nonaccrual Loans (Details) - USD ($) | Mar. 31, 2016 | Dec. 31, 2015 | Mar. 31, 2015
--- | --- | --- | ---
Real Estate Construction Portfolio Segment[Member] | Construction Residential [Member] |  |  |
Past due loans | $ 0 | $ 0 |
Loans past due 90 days or more and still accruing | 0 | 0 |
Nonaccruals (including impaired nonaccruals) | 683,000 | 718,000 |
Real Estate Construction Portfolio Segment[Member] | Construction Other [Member] |  |  |
Past due loans |  | 0 |
Loans past due 90 days or more and still accruing |  | 0 |
Nonaccruals (including impaired nonaccruals) |  | 0 |
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member] | Financing Receivables 30 to 89 Days Past Due [Member] |  |  |
Past due loans | 9,000 | 16,000 |
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Past due loans | 48,000 | 0 |
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member] |  |  |
Loans past due 90 days or more and still accruing | 48,000 | 0 |
Nonaccruals (including impaired nonaccruals) | 0 | 0 |
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member] | Financing Receivables 30 to 89 Days Past Due [Member] |  |  |
Past due loans | 1,049,000 | 1,402,000 |
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Past due loans | 239,000 | 106,000 |
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member] |  |  |
Loans past due 90 days or more and still accruing | 239,000 | 106,000 |
Nonaccruals (including impaired nonaccruals) | 0 | 14,000 |
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member] | Financing Receivables 30 to 89 Days Past Due [Member] |  |  |
Past due loans | 290,000 | 123,000 |
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Past due loans | 38,000 | 39,000 |
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member] |  |  |
Loans past due 90 days or more and still accruing | 38,000 | 39,000 |
Nonaccruals (including impaired nonaccruals) | 0 | 0 |
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member] | Financing Receivables 30 to 89 Days Past Due [Member] |  |  |
Past due loans | 319,000 | 248,000 |
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Past due loans | 0 | 0 |
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member] |  |  |
Loans past due 90 days or more and still accruing | 0 | 0 |
Nonaccruals (including impaired nonaccruals) | 11,000 | 0 |
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member] | Financing Receivables 30 to 89 Days Past Due [Member] |  |  |
Past due loans | 676,000 | 684,000 |
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Past due loans | 1,594,000 | 1,728,000 |
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member] |  |  |
Loans past due 90 days or more and still accruing | 0 | 0 |
Nonaccruals (including impaired nonaccruals) | 1,594,000 | 1,728,000 |
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member] | Financing Receivables 30 to 89 Days Past Due [Member] |  |  |
Past due loans | 0 | 0 |
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Past due loans | 357,000 | 357,000 |
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member] |  |  |
Loans past due 90 days or more and still accruing | 0 | 0 |
Nonaccruals (including impaired nonaccruals) | 485,000 | 494,000 |
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member] | Financing Receivables 30 to 89 Days Past Due [Member] |  |  |
Past due loans | 0 | 0 |
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Past due loans | 0 | 0 |
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member] |  |  |
Loans past due 90 days or more and still accruing | 0 | 0 |
Nonaccruals (including impaired nonaccruals) | 2,820,000 | 2,845,000 |
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member] | Financing Receivables 30 to 89 Days Past Due [Member] |  |  |
Past due loans | 22,000 | 142,000 |
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Past due loans | 812,000 | 883,000 |
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member] |  |  |
Loans past due 90 days or more and still accruing | 0 | 0 |
Nonaccruals (including impaired nonaccruals) | 812,000 | 883,000 |
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member] | Financing Receivables 30 to 89 Days Past Due [Member] |  |  |
Past due loans | 1,000 | 5,000 |
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Past due loans | 2,000 | 6,000 |
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member] |  |  |
Loans past due 90 days or more and still accruing | 2,000 | 6,000 |
Nonaccruals (including impaired nonaccruals) | 0 | 0 |
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member] | Financing Receivables 30 to 89 Days Past Due [Member] |  |  |
Past due loans | 195,000 | 286,000 |
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Past due loans | 0 | 5,000 |
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member] |  |  |
Loans past due 90 days or more and still accruing | 0 | 5,000 |
Nonaccruals (including impaired nonaccruals) | 0 | 0 |
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member] | Financing Receivables 30 to 89 Days Past Due [Member] |  |  |
Past due loans | 21,000 | 60,000 |
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Past due loans | 2,000 | 0 |
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member] |  |  |
Loans past due 90 days or more and still accruing | 1,000 | 0 |
Nonaccruals (including impaired nonaccruals) | 0 | 0 |
Public Sector and IDA Portfolio Segment[Member] |  |  |
Past due loans |  | 0 |
Loans past due 90 days or more and still accruing |  | 0 |
Nonaccruals (including impaired nonaccruals) |  | 0 |
Financing Receivables 30 to 89 Days Past Due [Member] |  |  |
Past due loans | 2,582,000 | 2,992,000 |
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Past due loans | 3,092,000 | 3,124,000 |
Loans past due 90 days or more and still accruing | 328,000 | 156,000 | $ 272,000
Nonaccruals (including impaired nonaccruals) | $ 6,405,000 | $ 6,682,000 | $ 9,225,000

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