Note H - Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2017
Current	$ 10,525	$ 8,757	$ 11,399
Deferred	1,701	(6,360)	638
Total	$ 12,226	$ 2,397	$ 12,037

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration