Note 8 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Apr. 29, 2023	Apr. 30, 2022	May 01, 2021	May 02, 2020
Statement [Line Items]
Unrecognized Tax Benefits, Ending Balance	$ 2,096	$ 2,079	$ 2,055	$ 1,974
Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions	6,000
Changes in Income Tax if All Uncertain Tax Positions Prevail	1,700
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	249
Unrecognized Tax Benefits, Period Increase (Decrease)	$ (1)
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Statement [Line Items]
Open Tax Year	2017 2018 2019 2020 2021 2022
State and Local Jurisdiction [Member] | Internal Revenue Service (IRS) [Member]
Statement [Line Items]
Open Tax Year	2016 2017 2018 2019 2020 2021 2022