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Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2013	Jan. 31, 2012
Consolidated Statements of Operations [Abstract]
Net sales	$ 27,450	$ 21,574	$ 85,318	$ 73,857
Costs of products sold	22,441	17,803	69,839	62,053
Gross profit	5,009	3,771	15,479	11,804
Operating expenses	4,054	3,990	12,205	11,950
Operating earnings (loss)	955	(219)	3,274	(146)
Other income	84	193	260	228
Interest expense	(80)	(110)	(295)	(333)
Earnings (loss) before income taxes	959	(136)	3,239	(251)
Income tax expense (benefit)	177	(170)	962	(237)
Net earnings (loss)	782	34	2,277	(14)
Less: net earnings attributable to the noncontrolling interest	238	156	450	211
Net earnings (loss) attributable to Kewaunee Scientific Corporation	$ 544	$ (122)	$ 1,827	$ (225)
Net earnings (loss) per share attributable to Kewaunee Scientific Corporation stockholders
Basic	$ 0.21	$ (0.05)	$ 0.71	$ (0.09)
Diluted	$ 0.21	$ (0.05)	$ 0.71	$ (0.09)
Weighted average number of common shares outstanding
Basic	2,590	2,579	2,586	2,579
Diluted	2,604	2,579	2,596	2,579

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