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Note 2 - Significant Transactions (Details Textual) - GKE Acquisition [Member]
$ in Thousands
Oct. 16, 2023
USD ($)
Payments to Acquire Businesses, Gross $ 87,187
Business Combination, Consideration Transferred, Liabilities Incurred 9,000
Proceeds from Lines of Credit $ 71,000
GKE GmbH and SAL GmbH [Member]  
Business Acquisition, Percentage of Voting Interests Acquired 100.00%
Beijing GKE Science & Technology Co. Ltd. [Member]  
Business Acquisition, Percentage of Voting Interests Acquired 100.00%