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Note 4 - Supplemental Information - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Depreciation, Total	$ 1,315	$ 1,518	$ 2,719	$ 2,922
Cost of Sales [Member]
Depreciation, Total	791	904	1,601	1,766
Operating Expense [Member]
Depreciation, Total	$ 524	$ 614	$ 1,118	$ 1,156

X

- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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