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Note 4 - Defined Benefit Plan (Tables) | 3 Months Ended
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Mar. 31, 2023
Notes Tables |
Schedule of Defined Benefit Plans Disclosures [Table Text Block] |
|  | Pension Benefits |
|  | Three Months Ended March 31, |
|  | 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 |

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