Note 8 - Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
May 02, 2020	Apr. 27, 2019	Apr. 28, 2018	Apr. 28, 2018
Current	$ 40,647	$ 39,673	$ 55,039
Deferred	(1,164)	3,351	676
Total	$ 39,483	$ 43,024	$ 55,715	$ 55,715

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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration