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Note 11 - Retirement Plans (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Schedule of Net Funded Status [Table Text Block] |
|  | December 31, |
|  | 2019 |  |  | 2018 |
Change in projected benefit obligation: |  |  |  |  |  |  |  |
Projected benefit obligation at beginning of year |  | $ | 117 |  |  | $ | 126 |
Interest cost |  |  | 5 |  |  |  | 5 |
Actuarial loss (gain) |  |  | 17 |  |  |  | (11 | )
Benefits paid |  |  | (4 | ) |  |  | (3 | )
Projected benefit obligation at end of year |  | $ | 135 |  |  | $ | 117 |
Change in plan assets: |  |  |  |  |  |  |  |
Fair value of pension plan assets at beginning of year |  | $ | 84 |  |  | $ | 88 |
Actual return on plan assets |  |  | 14 |  |  |  | (4 | )
Company contributions |  |  | 3 |  |  |  | 3 |
Benefits paid |  |  | (4 | ) |  |  | (3 | )
Fair value of pension plan assets at end of year |  |  | 97 |  |  |  | 84 |
Funded status of pension plan |  | $ | (38 | ) |  | $ | (33 | )
Amounts recognized on our balance sheets consist of: |  |  |  |  |  |  |  |
Accrued benefit cost |  | $ | 5 |  |  | $ | 2 |
Accumulated other comprehensive loss |  |  | (43 | ) |  |  | (35 | )
Net liability recognized |  | $ | (38 | ) |  | $ | (33 | )
Defined Benefit Plan, Assumptions [Table Text Block] |
|  | Year Ended December 31, |  |
|  | 2019 |  |  | 2018 |
Weighted-average assumptions used to determine net periodic benefit cost for the Gray Pension Plan: |  |  |  |  |  |  |  |  |  |
Discount rate |  |  | 4.16 | % |  |  |  | 3.55 | % |
Expected long-term rate of return on pension plan assets |  |  | 6.50 | % |  |  |  | 7.00 | % |
Estimated rate of increase in compensation levels |  |  | N/A |  |  |  |  | N/A |  |
|  | As of December 31, |  |
|  | 2019 |  |  | 2018 |
Weighted-average assumptions used to determine benefit obligations: |  |  |  |  |  |  |  |  |  |
Discount rate |  |  | 3.14 | % |  |  |  | 4.16 | % |
Schedule of Net Benefit Costs [Table Text Block] |
|  | Year Ended December 31, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
Components of net periodic pension cost: |  |  |  |  |  |  |  |  |  |  |  |
Interest cost |  |  | 5 |  |  |  | 5 |  |  |  | 5 |
Expected return on plan assets |  |  | (5 | ) |  |  | (6 | ) |  |  | (6 | )
Recognized net actuarial loss |  |  | - |  |  |  | - |  |  |  | 1 |
Net periodic pension benefit |  | $ | - |  |  | $ | (1 | ) |  | $ | - |
Schedule of Expected Benefit Payments [Table Text Block] |
Years |  |  | Amount |
| 2020 |  |  |  |  | 4 |
| 2021 |  |  |  |  | 4 |
| 2022 |  |  |  |  | 4 |
| 2023 |  |  |  |  | 5 |
| 2024 |  |  |  |  | 5 |
2025 | - | 2029 |  |  |  | 30 |
Schedule of Allocation of Plan Assets by Asset Category [Table Text Block] |
|  | As of December 31, |
|  | 2019 |  |  | 2018 |
Asset category: |  |  |  |  |  |
Insurance general account |  | 17% |  |  | 19% |
Cash management accounts |  | 2% |  |  | 1% |
Equity accounts |  | 47% |  |  | 47% |
Fixed income accounts |  | 32% |  |  | 31% |
Real estate accounts |  | 2% |  |  | 2% |
Total |  | 100% |  |  | 100% |
Schedule of Allocation of Plan Assets [Table Text Block] |
|  | Target Range |
|  | Strategic Allocation |  |  | Lower Limit |  |  | Upper Limit |
Asset class: |  |  |  |  |  |  |  |  |
Equities: |  |  |  |  |  |  |  |  |
Large cap value |  | 5% |  |  | 0% |  |  | 50% |
Large cap blend |  | 5% |  |  | 0% |  |  | 50% |
Large cap growth |  | 5% |  |  | 0% |  |  | 50% |
Mid cap blend |  | 15% |  |  | 0% |  |  | 40% |
Small cap core |  | 5% |  |  | 0% |  |  | 25% |
Foreign large blend |  | 10% |  |  | 0% |  |  | 40% |
Emerging markets |  | 10% |  |  | 0% |  |  | 25% |
Real estate |  | 5% |  |  | 0% |  |  | 20% |
Fixed Income: |  |  |  |  |  |  |  |  |
U.S. Treasury inflation protected |  | 5% |  |  | 0% |  |  | 25% |
Intermediate term bond |  | 10% |  |  | 0% |  |  | 50% |
Long term government bond |  | 5% |  |  | 0% |  |  | 40% |
High yield bond |  | 10% |  |  | 0% |  |  | 25% |
Emerging markets bond |  | 10% |  |  | 0% |  |  | 20% |
Money market taxable |  | 0% |  |  | 0% |  |  | 100% |
Defined Benefit Plan, Fair Value of Plan Assets [Table Text Block] |
|  | As of December 31, 2019 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Insurance general account |  | $ | - |  |  | $ | 16 |  |  | $ | - |  |  | $ | 16 |
Cash management accounts |  |  | 2 |  |  |  | - |  |  |  | - |  |  |  | 2 |
Equity accounts |  |  | 46 |  |  |  | - |  |  |  | - |  |  |  | 46 |
Fixed income accounts |  |  | 31 |  |  |  | - |  |  |  | - |  |  |  | 31 |
Real estate accounts |  |  | 2 |  |  |  | - |  |  |  | - |  |  |  | 2 |
Total |  | $ | 81 |  |  | $ | 16 |  |  | $ | - |  |  | $ | 97 |
|  | As of December 31, 2018 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Insurance general account |  | $ | - |  |  | $ | 17 |  |  | $ | - |  |  | $ | 17 |
Cash management accounts |  |  | 1 |  |  |  | - |  |  |  | - |  |  |  | 1 |
Equity accounts |  |  | 39 |  |  |  | - |  |  |  | - |  |  |  | 39 |
Fixed income account |  |  | 26 |  |  |  | - |  |  |  | - |  |  |  | 26 |
Real estate accounts |  |  | 1 |  |  |  | - |  |  |  | - |  |  |  | 1 |
Total |  | $ | 67 |  |  | $ | 17 |  |  | $ | - |  |  | $ | 84 |

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