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Note 6 - Restructuring and Other Exit Costs (Details Textual) - USD ($)
$ in Thousands
12 Months Ended 36 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Restructuring Charges, Total $ 1,275 $ 2,033  
Selling, General and Administrative Expenses [Member]      
Restructuring Charges, Total     $ 4,700