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Note 3 - Loans - Age Analysis of Past Due Loans and Nonaccrual Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015 | Sep. 30, 2015
--- | --- | --- | ---
Commercial and Agricultural Portfolio Segment [Member] | Commercial [Member] | Financing Receivables, 30-89 Days Past Due [Member] |  |  |
Accruing loans past due | $ 262 | $ 491 |
Commercial and Agricultural Portfolio Segment [Member] | Commercial [Member] |  |  |
Accruing loans past due | 262 | 491 |
Nonaccrual loans | 646 | 577 |
Current loans | 44,865 | 46,714 |
Loans | 45,773 | 47,782 | $ 48,759
Commercial and Agricultural Portfolio Segment [Member] | Agricultural [Member] | Financing Receivables, 30-89 Days Past Due [Member] |  |  |
Accruing loans past due | 67 | 71 |
Commercial and Agricultural Portfolio Segment [Member] | Agricultural [Member] |  |  |
Accruing loans past due | 67 | 71 |
Nonaccrual loans | 281 | 178 |
Current loans | 26,199 | 18,944 |
Loans | 26,547 | 19,193 | 27,373
Real Estate Portfolio Segment [Member] | Commercial [Member] | Financing Receivables, 30-89 Days Past Due [Member] |  |  |
Accruing loans past due | 261 | 6,031 |
Real Estate Portfolio Segment [Member] | Commercial [Member] |  |  |
Accruing loans past due | 261 | 6,031 |
Nonaccrual loans | 8,179 | 7,565 |
Current loans | 340,952 | 332,666 |
Loans | 349,392 | 346,262 | 347,703
Real Estate Portfolio Segment [Member] | Commercial Construction [Member] | Financing Receivables, 30-89 Days Past Due [Member] |  |  |
Accruing loans past due | 109 | 90 |
Real Estate Portfolio Segment [Member] | Commercial Construction [Member] |  |  |
Accruing loans past due | 109 | 90 |
Nonaccrual loans | 200 | 1,643 |
Current loans | 33,415 | 38,374 |
Loans | 33,724 | 40,107 | 43,589
Real Estate Portfolio Segment [Member] | Residential Construction [Member] |  |  |
Current loans | 10,325 | 9,413 |
Loans | 10,325 | 9,413 | 10,465
Real Estate Portfolio Segment [Member] | Residential [Member] | Financing Receivables, 30-89 Days Past Due [Member] |  |  |
Accruing loans past due | 3,069 | 3,683 |
Real Estate Portfolio Segment [Member] | Residential [Member] |  |  |
Accruing loans past due | 3,069 | 3,683 |
Nonaccrual loans | 3,520 | 3,164 |
Current loans | 188,456 | 190,155 |
Loans | 195,045 | 197,002 | 195,800
Real Estate Portfolio Segment [Member] | Farmland [Member] | Financing Receivables, 30-89 Days Past Due [Member] |  |  |
Accruing loans past due | 172 | 123 |
Real Estate Portfolio Segment [Member] | Farmland [Member] |  |  |
Accruing loans past due | 172 | 123 |
Nonaccrual loans | 919 | 1,103 |
Current loans | 72,710 | 60,554 |
Loans | 73,801 | 61,780 | 61,551
Consumer and Other Portfolio Segment [Member] | Consumer [Member] | Financing Receivables, 30-89 Days Past Due [Member] |  |  |
Accruing loans past due | 235 | 470 |
Consumer and Other Portfolio Segment [Member] | Consumer [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Accruing loans past due | 1 | 8 |
Consumer and Other Portfolio Segment [Member] | Consumer [Member] |  |  |
Accruing loans past due | 236 | 478 |
Nonaccrual loans | 241 | 178 |
Current loans | 19,901 | 19,949 |
Loans | 20,378 | 20,605 | 20,958
Consumer and Other Portfolio Segment [Member] | Other [Member] |  |  |
Current loans | 21,132 | 16,492 |
Loans | 21,132 | 16,492 | 8,006
Financing Receivables, 30-89 Days Past Due [Member] |  |  |
Accruing loans past due | 4,175 | 10,959 |
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |
Accruing loans past due | 1 | 8 |
Accruing loans past due | 4,176 | 10,967 |
Nonaccrual loans | 13,986 | 14,408 |
Current loans | 757,955 | 733,261 |
Loans | $ 776,117 | $ 758,636 | $ 764,204

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