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Note 5 - Supplemental Information - Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Depreciation, Total $ 1,404 $ 914
Cost of Sales [Member]    
Depreciation, Total 862 674
Operating Expense [Member]    
Depreciation, Total $ 542 $ 240