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Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jan. 31, 2012	Jan. 31, 2011	Jan. 31, 2012	Jan. 31, 2011
Consolidated Statements Of Operations [Abstract]
Net Sales	$ 21,574	$ 22,568	$ 73,857	$ 73,051
Costs of products sold	17,803	18,405	62,053	58,472
Gross profit	3,771	4,163	11,804	14,579
Operating expenses	3,990	4,007	11,950	11,953
Operating earnings (loss)	(219)	156	(146)	2,626
Other income	193	1	228
Interest (expense) income	(110)	17	(333)	(105)
Earnings (loss) before income taxes	(136)	174	(251)	2,521
Income tax expense (benefit)	(170)	49	(237)	792
Net earnings (loss)	34	125	(14)	1,729
Less: net earnings attributable to the noncontrolling interest	156	39	211	131
Net earnings (loss) attributable to Kewaunee Scientific Corporation Stockholders	$ (122)	$ 86	$ (225)	$ 1,598
Net earnings (loss) per share attributable to Kewaunee Scientific Corporation Stockholders
Basic	$ (0.05)	$ 0.03	$ (0.09)	$ 0.62
Diluted	$ (0.05)	$ 0.03	$ (0.09)	$ 0.62
Weighted average number of common shares outstanding
Basic	2,579	2,576	2,579	2,574
Diluted	2,579	2,592	2,579	2,583

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