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Note 8 - Accrued Retirement Benefits - Net Periodic Cost (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Interest cost $ 184 $ 203 $ 368 $ 406
Expected return on plan assets (174) (164) (348) (328)
Amortization of net loss 68 82 136 165
Pension and other postretirement expenses $ 78 $ 121 $ 156 $ 243