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Note 14 - Segment Data - Long-lived Assets by Geographic Area (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Mar. 31, 2024
Long-lived assets $ 48,715 $ 42,304
UNITED STATES    
Long-lived assets 29,200 32,229
SWEDEN    
Long-lived assets 11,634 1,271
GERMANY    
Long-lived assets 6,712 7,596
Non-US [Member]    
Long-lived assets $ 1,169 $ 1,208