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Note 13 - Employee Benefit Plans - Weighted Average Actuarial Assumptions (Details)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Discount rate for net periodic benefit cost 2.54% 3.28%
Discount rate for benefit obligations 2.85% 2.54%
Expected rate of return on plan assets 6.50% 6.75%