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Note 14 - Segment Data - Revenues From External Customers (Details) - USD ($) $ in Thousands		12 Months Ended
		Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Revenues	[1]	$ 240,978	$ 216,187	$ 219,080
UNITED STATES
Revenues		116,615	106,395	117,281
CHINA
Revenues		25,312	24,933	25,797
Other [Member]
Revenues		$ 99,051	$ 84,859	$ 76,002
[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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