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Note 5 - Loans and Allowance for Loan Losses - Loans Restructured as TDRs, Excluding Loans Acquired, Segregated by Class of Loans (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Number of Loans | 16 | 70
Balance Prior to TDR | $ 11,001 | $ 13,907
Balance | 10,905 | 13,757
Financial Impact on Date of Restructure | 33 |
Extended Maturity [Member] |  |
Balance | 10,866 | 12,071
Contractual Interest Rate Reduction [Member] |  |
Balance | $ 39 | $ 1,686
Commercial Real Estate Portfolio Segment [Member] |  |
Number of Loans | 5 | 51
Balance Prior to TDR | $ 8,310 | $ 11,861
Balance | 8,301 | 11,778
Financial Impact on Date of Restructure | 33 |
Commercial Real Estate Portfolio Segment [Member] | Extended Maturity [Member] |  |
Balance | 8,301 | 10,092
Commercial Real Estate Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member] |  |
Balance |  | $ 1,686
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |
Number of Loans | 1 |
Balance Prior to TDR | $ 456 |
Balance | 456 |
Financial Impact on Date of Restructure |  |
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Extended Maturity [Member] |  |
Balance | 456 |
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Contractual Interest Rate Reduction [Member] |  |
Balance |  |
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] |  |
Number of Loans | 1 | 23
Balance Prior to TDR | $ 139 | $ 1,570
Balance | 130 | 1,518
Financial Impact on Date of Restructure |  |
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Extended Maturity [Member] |  |
Balance | 130 | 964
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Loans [Member] | Contractual Interest Rate Reduction [Member] |  |
Balance |  | $ 554
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member] |  |
Number of Loans | 3 | 28
Balance Prior to TDR | $ 7,715 | $ 10,291
Balance | 7,715 | 10,260
Financial Impact on Date of Restructure | 33 |
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member] | Extended Maturity [Member] |  |
Balance | 7,715 | 9,128
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Loans [Member] | Contractual Interest Rate Reduction [Member] |  |
Balance |  | $ 1,132
Commercial Real Estate Portfolio Segment [Member] | Commercial Loans [Member] |  |
Number of Loans | 11 |
Balance Prior to TDR | $ 2,691 |
Balance | 2,604 |
Financial Impact on Date of Restructure |  |
Commercial Real Estate Portfolio Segment [Member] | Commercial Loans [Member] | Extended Maturity [Member] |  |
Balance | 2,565 |
Commercial Real Estate Portfolio Segment [Member] | Commercial Loans [Member] | Contractual Interest Rate Reduction [Member] |  |
Balance | $ 39 |
Commercial Portfolio Segment [Member] |  |
Number of Loans | 11 | 17
Balance Prior to TDR | $ 2,691 | $ 1,996
Balance | 2,604 | 1,968
Financial Impact on Date of Restructure |  |
Commercial Portfolio Segment [Member] | Extended Maturity [Member] |  |
Balance | 2,565 | 1,968
Commercial Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member] |  |
Balance | $ 39 |
Commercial Portfolio Segment [Member] | Commercial Loans [Member] |  |
Number of Loans |  | 17
Balance Prior to TDR |  | $ 1,996
Balance |  | 1,968
Financial Impact on Date of Restructure |  |
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Extended Maturity [Member] |  |
Balance |  | 1,968
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Contractual Interest Rate Reduction [Member] |  |
Balance |  |
Consumer Portfolio Segment [Member] |  |
Number of Loans |  | 2
Balance Prior to TDR |  | $ 50
Balance |  | 11
Financial Impact on Date of Restructure |  |
Consumer Portfolio Segment [Member] | Extended Maturity [Member] |  |
Balance |  | 11
Consumer Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member] |  |
Balance |  |
Consumer Portfolio Segment [Member] | Other Loans [Member] |  |
Number of Loans |  | 2
Balance Prior to TDR |  | $ 50
Balance |  | 11
Financial Impact on Date of Restructure |  |
Consumer Portfolio Segment [Member] | Other Loans [Member] | Extended Maturity [Member] |  |
Balance |  | 11
Consumer Portfolio Segment [Member] | Other Loans [Member] | Contractual Interest Rate Reduction [Member] |  |
Balance |  |

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