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Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2010
Consolidated Statements of Operations [Abstract]
Net sales	$ 102,847	$ 100,003	$ 99,093
Costs of products sold	83,691	80,719	77,690
Gross profit	19,156	19,284	21,403
Operating expenses	16,443	16,127	15,576
Operating earnings	2,713	3,157	5,827
Other income (expense)	271	4	1
Interest expense	(445)	(199)	(157)
Earnings before income taxes	2,539	2,962	5,671
Income tax expense	739	864	1,921
Net earnings	1,800	2,098	3,750
Less: net earnings attributable to the noncontrolling interest	769	248	178
Net earnings attributable to Kewaunee Scientific Corporation	$ 1,031	$ 1,850	$ 3,572
Net earnings per share attributable to Kewaunee Scientific Corporation stockholders
Basic	$ 0.40	$ 0.72	$ 1.39
Diluted	$ 0.40	$ 0.72	$ 1.39
Weighted average number of Common shares outstanding
Basic	2,579	2,575	2,564
Diluted	2,580	2,585	2,575

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