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Nu Aire Acquisition - Pro Forma Information (Details) - Nu Aire - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Apr. 30, 2025	Apr. 30, 2024
Business Acquisition [Line Items]
Net sales	$ 276,696	$ 284,630
Net earnings	$ 11,661	$ 19,293
Net earnings per share attributable to Kewaunee Scientific Corporation stockholders:
Basic (in USD per share)	$ 4.07	$ 6.70
Diluted (in USD per share)	$ 3.91	$ 6.57

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