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Note 1 - Nature of Operations (Details Textual)
€ in Thousands
3 Months Ended
Mar. 12, 2024
USD ($)
shares
Mar. 12, 2024
EUR (€)
shares
May 11, 2023
USD ($)
shares
Mar. 08, 2023
Mar. 31, 2024
Mar. 12, 2024
EUR (€)
Number of Operating Segments       2 3  
At-the-Market Issuance Sales Agreement [Member]            
Stock Issued During Period, Shares, New Issues (in shares) | shares     921,797      
Aggregate Offering Price of Stock     $ 20,000      
Stock Issued During Period, Value, New Issues     $ 19,244      
Commission Fee, Percentage of Gross Proceeds     3.00%      
Alfamation [Member]            
Business Combination, Consideration Transferred $ 22,353,000 € 20,000        
Payments to Acquire Businesses, Gross $ 19,674,000 € 18,000        
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | shares 187,432 187,432        
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable $ 2,086,000          
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred 593,000 € 542        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities, Debt $ 9,418,000         € 8,616