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Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jul. 31, 2018	Jul. 31, 2017
Income Statement [Abstract]
Net Sales	$ 42,152	$ 33,881
Costs of products sold	34,678	27,060
Gross profit	7,474	6,821
Operating expenses	5,763	5,133
Operating earnings	1,711	1,688
Other income	164	168
Interest expense, net	(91)	(59)
Earnings before income taxes	1,784	1,797
Income tax expense	368	605
Net earnings	1,416	1,192
Less: net earnings attributable to the noncontrolling interest	9	44
Net earnings attributable to Kewaunee Scientific Corporation	$ 1,407	$ 1,148
Net earnings per share attributable to Kewaunee Scientific Corporation stockholders
Basic	$ 0.51	$ 0.42
Diluted	$ 0.50	$ 0.42
Weighted average number of common shares outstanding
Basic	2,736	2,712
Diluted	2,804	2,755

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