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Note 6 - Goodwill and Other Intangibles (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Mar. 31, 2025
Goodwill, Impairment Loss $ 0 $ 0  
Customer Relationship, Core Technology and Know-how [Member]      
Amortization of Intangible Assets $ 300 $ 400  
Megatran [Member]      
Goodwill, Acquired During Period     $ 4,700