Note 11 - Retirement Plans (Tables) - Supplemental Employee Retirement Plan [Member]
|
12 Months Ended |
Dec. 31, 2016 |
|---|
| Notes Tables |
|
| Schedule of Changes in Projected Benefit Obligations [Table Text Block] |
| | | | | | | | Change in Benefit Obligation | | | | | | | | | Obligation at beginning of year | | $ | 600 | | | $ | 583 | | | | | | 19 | | | | 15 | | | | | | 24 | | | | 19 | | | | | | 111 | | | | 19 | | | | | | (36 | ) | | | (36 | ) | Obligation at end of year | | $ | 718 | | | $ | 600 | | |
| Schedule of Net Benefit Costs [Table Text Block] |
| | | | | | | | | | | $ | 19 | | | $ | 15 | | | | | | 24 | | | | 19 | | Recognized net actuarial loss | | | 5 | | | | - | | Net periodic benefit cost | | $ | 48 | | | $ | 34 | | | | | | | | | | | | Discount rate used to determine net period benefit cost | | | 3.39 | % | | | 3.22 | % | Discount rate used to determine benefit obligation at year end | | | 3.31 | | | | 3.39 | | Rate of compensation increase | | | 4.00 | | | | 4.00 | | |
| Schedule of Expected Benefit Payments [Table Text Block] |
| | | | | | | | $ | 36 | | | | | | 36 | | | | | | 36 | | | | | | 71 | | | | | | 83 | | | 2022-2026 | | | 356 | | | | | $ | 618 | | |
| Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] |
| | | | | | | | Unrecognized net actuarial loss (gain) | | $ | 87 | | | $ | (19 | ) | | | | $ | 87 | | | $ | (19 | ) | |
| Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block] |
| | | | | Unrecognized net actuarial loss | | $ | 5 | | | | | $ | 5 | | |