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Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020
Statement of Comprehensive Income [Abstract]
Net loss	$ (3,082)	$ (165)	$ (4,389)	$ (773)
Other comprehensive loss, net of tax:
Foreign currency translation adjustments	(83)	(35)	(159)	(48)
Other comprehensive loss	(83)	(35)	(159)	(48)
Comprehensive loss, net of tax	(3,165)	(200)	(4,548)	(821)
Less: Comprehensive income attributable to the non-controlling interest	18	15	56	5
Comprehensive loss attributable to Kewaunee Scientific Corporation	$ (3,183)	$ (215)	$ (4,604)	$ (826)

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