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Note 4 - Fair Value Measurements (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2022
Jun. 30, 2022
Sep. 30, 2021
Dec. 31, 2022
Dec. 31, 2021
Mar. 31, 2022
Payment for Contingent Consideration Liability, Financing Activities       $ 1,167 $ 1,167  
Business Combination, Contingent Consideration, Liability, Total   $ 1,167        
GS Engineering [Member]            
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High       $ 12,800    
Renco Electronics [Member]            
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High           $ 3,500
Payment for Contingent Consideration Liability, Financing Activities $ 1,200 $ 1,000 $ 1,200      
Business Combination, Contingent Consideration, Liability, Total           $ 3,400