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Note 11 - Retirement Plans (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Schedule of Net Funded Status [Table Text Block] |
|  | December 31, |
|  | 2020 |  |  | 2019 |
Change in projected benefit obligation: |  |  |  |  |  |  |  |
Projected benefit obligation at beginning of year |  | $ | 135 |  |  | $ | 117 |
Interest cost |  |  | 4 |  |  |  | 5 |
Actuarial loss |  |  | 16 |  |  |  | 17 |
Benefits paid |  |  | (4 | ) |  |  | (4 | )
Projected benefit obligation at end of year |  | $ | 151 |  |  | $ | 135 |
Change in plan assets: |  |  |  |  |  |  |  |
Fair value of pension plan assets at beginning of year |  | $ | 97 |  |  | $ | 84 |
Actual return on plan assets |  |  | 12 |  |  |  | 14 |
Company contributions |  |  | 3 |  |  |  | 3 |
Benefits paid |  |  | (4 | ) |  |  | (4 | )
Fair value of pension plan assets at end of year |  |  | 108 |  |  |  | 97 |
Funded status of pension plan |  | $ | (43 | ) |  | $ | (38 | )
Amounts recognized on our balance sheets consist of: |  |  |  |  |  |  |  |
Accrued benefit cost |  | $ | 10 |  |  | $ | 5 |
Accumulated other comprehensive loss |  |  | (53 | ) |  |  | (43 | )
Net liability recognized |  | $ | (43 | ) |  | $ | (38 | )
Defined Benefit Plan, Assumptions [Table Text Block] |
|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |
Weighted-average assumptions used to determine net periodic benefit cost for the Gray Pension Plan: |  |  |  |  |  |  |  |
Discount rate |  |  | 3.14 | % |  |  | 4.16 | %
Expected long-term rate of return on pension plan assets |  |  | 6.50 | % |  |  | 6.50 | %
Estimated rate of increase in compensation levels |  |  | N/A |  |  |  | N/A |
|  | As of December 31, |
|  | 2020 |  |  | 2019 |
Weighted-average assumptions used to determine benefit obligations: |  |  |  |  |  |  |  |
Discount rate |  |  | 2.38 | % |  |  | 3.14 | %
Schedule of Net Benefit Costs [Table Text Block] |
|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Components of net periodic pension cost: |  |  |  |  |  |  |  |  |  |  |  |
Interest cost |  | $ | 4 |  |  | $ | 5 |  |  | $ | 5 |
Expected return on plan assets |  |  | (6 | ) |  |  | (5 | ) |  |  | (6 | )
Recognized net actuarial loss |  |  | 1 |  |  |  | - |  |  |  | - |
Net periodic pension benefit |  | $ | (1 | ) |  | $ | - |  |  | $ | (1 | )
Schedule of Expected Benefit Payments [Table Text Block] |
Years |  |  | Amount |
2021 |  |  | $ | 4 |
2022 |  |  |  | 4 |
2023 |  |  |  | 5 |
2024 |  |  |  | 5 |
2025 |  |  |  | 5 |
2026 | - | 2030 |  |  |  | 31 |
Schedule of Allocation of Plan Assets by Asset Category [Table Text Block] |
|  | As of December 31, |
|  | 2020 |  |  | 2019 |
Asset category: |  |  |  |  |  |  |  |
Insurance general account |  |  | 15 | % |  |  | 17 | %
Cash management accounts |  |  | 3 | % |  |  | 2 | %
Equity accounts |  |  | 48 | % |  |  | 47 | %
Fixed income accounts |  |  | 32 | % |  |  | 32 | %
Real estate accounts |  |  | 2 | % |  |  | 2 | %
Total |  |  | 100 | % |  |  | 100 | %
Schedule of Allocation of Plan Assets [Table Text Block] |
|  | Target Range |
Asset class: |  | Strategic Allocation |  |  | Lower Limit |  |  | Upper Limit |
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, 2020 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Insurance general account |  | $ | - |  |  | $ | 16 |  |  | $ | - |  |  | $ | 16 |
Cash management accounts |  |  | 3 |  |  |  | - |  |  |  | - |  |  |  | 3 |
Equity accounts |  |  | 52 |  |  |  | - |  |  |  | - |  |  |  | 52 |
Fixed income accounts |  |  | 35 |  |  |  | - |  |  |  | - |  |  |  | 35 |
Real estate accounts |  |  | 2 |  |  |  | - |  |  |  | - |  |  |  | 2 |
Total |  | $ | 92 |  |  | $ | 16 |  |  | $ | - |  |  | $ | 108 |
|  | 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 account |  |  | 31 |  |  |  | - |  |  |  | - |  |  |  | 31 |
Real estate accounts |  |  | 2 |  |  |  | - |  |  |  | - |  |  |  | 2 |
Total |  | $ | 81 |  |  | $ | 16 |  |  | $ | - |  |  | $ | 97 |

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