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Note 6 - Fair Value Measurements (Details Textual) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Sep. 30, 2023
Oct. 04, 2023
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax $ 3      
Goodwill and Intangible Asset Impairment     $ 0  
Payment for Contingent Consideration Liability, Financing Activities 219 $ (0)    
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability (16) $ 0    
Evertel Technologies, LLC [Member]        
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High       $ 1,050
Business Combination, Contingent Consideration, Liability 0     $ 890
Business Combination, Contingent Consideration, Liability Settled 874      
Payment for Contingent Consideration Liability, Financing Activities 219      
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability $ 16      
Evertel Technologies, LLC [Member] | Contingent Consideration Liability [Member]        
Stock Issued During Period, Shares, Acquisitions 236,343