Note 8 - Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	May 01, 2021	May 02, 2020
Beginning balance	$ 2,055	$ 1,974	$ 1,868
Increases due to current period tax positions	114	150	120
Decreases due to lapse of statute of limitations and audit resolutions	(90)	(69)	(14)
Ending balance	$ 2,079	$ 2,055	$ 1,974