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Note 2 - Significant Transactions (Details Textual)
$ in Thousands, € in Millions
Oct. 14, 2023
USD ($)
Oct. 14, 2023
EUR (€)
Nov. 17, 2022
USD ($)
GKE Acquisition [Member] | Subsequent Event [Member]      
Business Combination, Consideration Transferred | €   € 85.0  
Business Combination, Consideration Transferred, Liabilities Incurred | €   8.5  
Business Combination, Consideration Transferred, Contingent Consideration Liability | €   € 5.0  
Proceeds from Lines of Credit $ 65,000    
GKE Acquisition [Member] | GKE GmbH and SAL GmbH [Member] | Subsequent Event [Member]      
Business Acquisition, Percentage of Voting Interests Acquired 100.00% 100.00%  
GKE Acquisition [Member] | Beijing GKE Science & Technology Co. Ltd. [Member] | Subsequent Event [Member]      
Business Acquisition, Percentage of Voting Interests Acquired 100.00% 100.00%  
Belyntic Acquisition [Member]      
Business Combination, Consideration Transferred     $ 6,450
Payments to Acquire Businesses, Gross     4,950
Business Combination, Contingent Consideration, Liability     $ 1,500