CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Income Statement [Abstract]
Net sales	$ 111,166	$ 117,121	$ 102,847
Costs of products sold	89,134	94,863	83,691
Gross profit	22,032	22,258	19,156
Operating expenses	16,068	16,981	16,443
Operating earnings	5,964	5,277	2,713
Other income	395	306	271
Interest expense	(373)	(362)	(445)
Earnings before income taxes	5,986	5,221	2,539
Income tax expense	1,983	1,540	739
Net earnings	4,003	3,681	1,800
Less: net earnings attributable to the noncontrolling interest	108	637	769
Net earnings attributable to Kewaunee Scientific Corporation	$ 3,895	$ 3,044	$ 1,031
Net earnings per share attributable to Kewaunee Scientific Corporation stockholders
Basic	$ 1.49	$ 1.18	$ 0.40
Diluted	$ 1.48	$ 1.17	$ 0.40
Weighted average number of common shares outstanding
Basic	2,608	2,587	2,579
Diluted	2,634	2,600	2,580