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Note 8 - Property, Plant and Equipment (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Depreciation $ 5,000 $ 5,700 $ 10,200 $ 11,700
Interest Paid, Capitalized, Investing Activities 0 $ 200    
Asset Impairment Charges $ 0