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Note 4 - Defined Benefit Plan (Tables) | 6 Months Ended
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Jun. 30, 2023
Notes Tables |
Schedule of Defined Benefit Plans Disclosures [Table Text Block] |
|  | Pension Benefits |
|  | Three Months Ended June 30, |
|  | 2023 |  |  | 2022 |
Service cost |  | $ | 203 |  |  | $ | 324 |
Interest cost |  |  | 273 |  |  |  | 204 |
Expected return on plan assets |  |  | (518 | ) |  |  | (629 | )
Amortization of prior service cost |  |  | - |  |  |  | - |
Recognized net actuarial loss |  |  | 17 |  |  |  | 110 |
Net periodic benefit (income) cost |  | $ | (25 | ) |  | $ | 9 |
|  | Pension Benefits |
|  | Six Months Ended June 30, |
|  | 2023 |  |  | 2022 |
Service cost |  | $ | 406 |  |  | $ | 648 |
Interest cost |  |  | 546 |  |  |  | 408 |
Expected return on plan assets |  |  | (1,036 | ) |  |  | (1,258 | )
Amortization of prior service cost |  |  | - |  |  |  | - |
Recognized net actuarial loss |  |  | 34 |  |  |  | 220 |
Net periodic benefit (income) cost |  | $ | (50 | ) |  | $ | 18 |

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