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Note 14 - Employee Benefit Plans - Components of Pension Expense (Benefit) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Service cost $ 4 $ 5
Interest cost on projected benefit obligation 774 1,084
Net amortization of actuarial loss 613 631
Expected return on plan assets (773) (987)
Net periodic benefit cost $ 618 $ 733