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Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2016	Oct. 31, 2015
Income Statement [Abstract]
Net sales	$ 36,329	$ 31,037	$ 73,608	$ 62,126
Costs of products sold	29,225	25,505	59,365	50,751
Gross profit	7,104	5,532	14,243	11,375
Operating expenses	4,816	4,403	9,894	8,722
Operating earnings	2,288	1,129	4,349	2,653
Other income	119	85	238	187
Interest expense	(78)	(61)	(158)	(153)
Earnings before income taxes	2,329	1,153	4,429	2,687
Income tax expense	792	446	1,562	1,017
Net earnings	1,537	707	2,867	1,670
Less: net earnings attributable to the noncontrolling interest	51	12	81	35
Net earnings attributable to Kewaunee Scientific Corporation	$ 1,486	$ 695	$ 2,786	$ 1,635
Net earnings per share attributable to Kewaunee Scientific Corporation stockholders
Basic	$ 0.55	$ 0.26	$ 1.03	$ 0.62
Diluted	$ 0.54	$ 0.26	$ 1.02	$ 0.61
Weighted average number of common shares outstanding
Basic	2,706	2,671	2,699	2,650
Diluted	2,729	2,690	2,718	2,674

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