Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Apr. 26, 2015	$ 34,876	$ 6,583	$ 1,841	$ (53)	$ 34,385	$ (7,880)
Net earnings attributable to Kewaunee Scientific Corporation	3,802				3,802
Other comprehensive income	254					254
Cash dividends paid	(1,361)				(1,361)
Stock options exercised	479	137	342
Stock based compensation	192		192
Balance at Apr. 30, 2016	38,242	6,720	2,375	(53)	36,826	(7,626)
Net earnings attributable to Kewaunee Scientific Corporation	4,515				4,515
Other comprehensive income	1,307					1,307
Cash dividends paid	(1,570)				(1,570)
Stock options exercised	190	69	121
Stock based compensation	199		199
Balance at Apr. 30, 2017	42,883	6,789	2,695	(53)	39,771	(6,319)
Net earnings attributable to Kewaunee Scientific Corporation	5,188				5,188
Other comprehensive income	419					419
Cash dividends paid	(1,794)				(1,794)
Stock options exercised	12	52	(40)
Stock based compensation	351		351
Balance at Apr. 30, 2018	$ 47,059	$ 6,841	$ 3,006	$ (53)	$ 43,165	$ (5,900)