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Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings As Adjusted	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Apr. 30, 2019	$ 47,100	$ 6,875	$ 3,133	$ (53)	$ 43,552	$ (6,407)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss) attributable to Kewaunee Scientific Corporation	(4,687)				(4,687)
Other comprehensive income (expense)	(3,191)					(3,191)
Cash dividends paid	(1,044)				(1,044)
Stock options exercised	0	1	(1)
Stock based compensation	237	9	228
Ending balance at Apr. 30, 2020	38,415	6,885	3,360	(53)	37,821	(9,598)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss) attributable to Kewaunee Scientific Corporation	(3,672)				(3,672)
Other comprehensive income (expense)	6,021					6,021
Stock based compensation	477	30	447
Ending balance at Apr. 30, 2021	$ 41,241	$ 6,915	$ 3,807	$ (53)	$ 34,149	$ (3,577)

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