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Note 19 - Pension Plan - Amounts Recognized in Balance Sheet (Details) - Pension Plan [Member] - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Present value of accumulated benefit obligation $ (701) $ (37,925)  
Effect of future compensation increases (1,113) (1,049)  
Present value of projected benefit obligation (1,813) (38,974) $ (42,368)
Fair value of plan assets 10 37,177 $ 38,813
Net liability for pension benefits $ (1,803) $ (1,797)