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Note 2 - Revenue (Details Textual) - USD ($) $ in Thousands		12 Months Ended
		Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Revenue from Contract with Customer, Excluding Assessed Tax	[1]	$ 240,978	$ 216,187	$ 219,080
Sterilization and Disinfection Control [Member] | GKE GmbH and SAL GmbH [Member]
Revenue from Contract with Customer, Excluding Assessed Tax		$ 24,815
Sterilization and Disinfection Control [Member] | GKE China [Member]
Revenue from Contract with Customer, Excluding Assessed Tax			$ 9,289
[1] Intersegment revenues are not significant and are eliminated to arrive at consolidated totals. Revenues as presented are consistent with GAAP measurement principles and our CODM's review of segment information.

X

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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