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Note 6 - Goodwill and Other Intangibles - Intangible Assets (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Mar. 31, 2025
Gross Amount $ 20,031 $ 20,031
Accumulated Amortization (14,452) (14,116)
Net Book Value 3,779  
Intangible assets, net 5,579 5,916
Trade Names [Member]    
Indefinite life intangible assets 1,800 1,800
Backlog [Member]    
Gross Amount 1,381 1,381
Accumulated Amortization (1,381) (1,381)
Net Book Value 0 0
Customer Relationships [Member]    
Gross Amount 10,880 10,880
Accumulated Amortization (8,116) (7,901)
Net Book Value 2,764 2,980
Core Technology and Know-how [Member]    
Gross Amount 5,970 5,970
Accumulated Amortization (4,955) (4,834)
Net Book Value $ 1,015 $ 1,136