Note 5 - Debt (Details Textual) - USD ($) $ in Thousands			12 Months Ended			16 Months Ended
	Apr. 29, 2023	Dec. 21, 2021	Apr. 29, 2023	Apr. 30, 2022	May 01, 2021	Apr. 29, 2023
Statement [Line Items]
Proceeds from Issuance of Long-Term Debt			$ 0	$ 50,000	$ 0
Term Loan Facility [Member]
Statement [Line Items]
Debt Instrument, Face Amount		$ 50,000
Proceeds from Issuance of Long-Term Debt						$ 50,000
Long-Term Debt, Gross	$ 0		0	$ 30,000		0
Secured Overnight Financing Rate (SOFR) [Member] | Term Loan Facility [Member]
Statement [Line Items]
Debt Instrument, Basis Spread on Variable Rate		0.95%
Revolving Credit Facility [Member]
Statement [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	100,000		100,000			100,000
Long-Term Line of Credit	0		0			0
Letters of Credit Outstanding, Amount	2,200		2,200			2,200
Line of Credit Facility, Remaining Borrowing Capacity	$ 97,800		$ 97,800			$ 97,800
Revolving Credit Facility [Member] | Secured Overnight Financing Rate (SOFR) [Member]
Statement [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.05%