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Note 4 - Fair Value Measurements (Details Textual) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Aug. 31, 2022
Apr. 30, 2022
Mar. 31, 2022
Mar. 31, 2022
Mar. 31, 2021
Jun. 30, 2021
Payment for Contingent Consideration Liability, Financing Activities       $ 1,167 $ (0)  
Business Combination, Contingent Consideration, Liability, Total [1]     $ 2,167 2,167   $ 3,333
GS Engineering [Member]            
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High     12,800 12,800    
Renco Electronics [Member]            
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High     3,500 3,500    
Payment for Contingent Consideration Liability, Financing Activities     1,200      
Business Combination, Contingent Consideration, Liability, Total     $ 3,400 $ 3,400    
Renco Electronics [Member] | Forecast [Member]            
Payment for Contingent Consideration Liability, Financing Activities $ 1,200          
Renco Electronics [Member] | Subsequent Event [Member]            
Payment for Contingent Consideration Liability, Financing Activities   $ 1,000        
[1] The fair value of contingent consideration arrangements is determined based on the Company's evaluation as to the probability and amount of any contingent consideration that has been earned to date.