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Note 20 - Subsequent Events (Details Textual)
$ in Thousands, € in Millions
1 Months Ended 12 Months Ended
Feb. 01, 2023
USD ($)
Feb. 01, 2023
EUR (€)
Jan. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Proceeds from Lines of Credit, Total       $ 0 $ 115,000
Subsequent Event [Member] | Credit and Security Agreement with KeyBank [Member] | Revolving Credit Facility [Member]          
Proceeds from Lines of Credit, Total     $ 5,000    
Innolectric AG [Member] | Subsequent Event [Member]          
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 33.33% 33.33%      
Payments to Acquire Interest in Subsidiaries and Affiliates, Total $ 8,800 € 8