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Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jul. 31, 2019	Jul. 31, 2018
Income Statement [Abstract]
Net sales	$ 39,336	$ 42,152
Cost of products sold	32,390	34,569
Gross profit	6,946	7,583
Operating expenses	6,170	5,763
Operating earnings	776	1,820
Other income	56	164
Interest expense, net	(167)	(91)
Earnings before income taxes	665	1,893
Income tax expense	169	395
Net earnings	496	1,498
Less: net earnings attributable to the noncontrolling interest	25	9
Net earnings attributable to Kewaunee Scientific Corporation	$ 471	$ 1,489
Net earnings per share attributable to Kewaunee Scientific Corporation stockholders
Basic (in dollars per share)	$ 0.17	$ 0.54
Diluted (in dollars per share)	$ 0.17	$ 0.53
Weighted average number of common shares outstanding
Basic (in shares)	2,750	2,736
Diluted (in shares)	2,771	2,804

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