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Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2019	Oct. 31, 2018
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ (2,161)	$ 1,372	$ (1,665)	$ 2,870
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(179)	(725)	17	(1,113)
Change in fair value of cash flow hedge	2	1	1	5
Other comprehensive income (loss)	(177)	(724)	18	(1,108)
Comprehensive income (loss), net of tax	(2,338)	648	(1,647)	1,762
Less: comprehensive income attributable to the noncontrolling interest	17	40	42	49
Comprehensive income (loss) attributable to Kewaunee Scientific Corporation	$ (2,355)	$ 608	$ (1,689)	$ 1,713

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