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Note 10 - Revenue and Revenue Recognition - Disaggregation of Revenue (Details) - Customer Concentration Risk [Member]	9 Months Ended
	Feb. 28, 2026	Feb. 28, 2025
Revenue from Contract with Customer Benchmark [Member] \| End User Customers [Member]
Percentage	69.00%	76.00%
Revenue, Product and Service Benchmark [Member] \| Distributors [Member]
Percentage	31.00%	24.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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