Note 4 - Loans and the Allowance for Loan Losses - Changes in the Allowance for Loan Losses (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
Dec. 31, 2015 |
|
| Beginning balance | $ 6,430 | $ 5,780 | $ 6,078 | $ 5,451 | $ 5,451 |
| Provision | 200 | 300 | 600 | 900 | 1,100 |
| Charge-offs | (227) | (222) | (757) | (672) | (827) |
| Recoveries | 74 | 59 | 556 | 238 | 354 |
| Ending balance | $ 6,477 | $ 5,917 | $ 6,477 | $ 5,917 | $ 6,078 |