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Note H - Income Taxes - Reconciliation of Income Tax to Statutory Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2016
Tax provision at statutory rate	$ 11,827	$ 11,285	$ 6,474
State taxes, net of federal benefit	1,077	868	443
Tax benefit from option exercises	(1,721)
Deferred tax adjustment related to Tax Act	(8,083)
Other, net	(703)	(116)	(15)
Provision for income taxes	$ 2,397	$ 12,037	$ 6,902

X

- Definition

Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to excess tax benefit for share-based compensation cost.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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