Fair Value Measurements - Hierarchy and Transfers (Details) - USD ($) $ in Thousands	Oct. 28, 2023	Apr. 29, 2023
Assets
Total assets	$ 21,341	$ 24,903
Recurring basis
Assets
Marketable securities	20,056	23,552
Held-to-maturity investments	1,285	1,351
Total assets	21,341	24,903
Recurring basis | Level 1
Assets
Marketable securities	0	0
Held-to-maturity investments	1,285	1,351
Total assets	1,285	1,351
Recurring basis | Level 2
Assets
Marketable securities	9,903	16,557
Held-to-maturity investments	0	0
Total assets	9,903	16,557
Recurring basis | Level 3
Assets
Marketable securities	0	0
Held-to-maturity investments	0	0
Total assets	0	0
Recurring basis | NAV
Assets
Marketable securities	10,153	6,995
Held-to-maturity investments	0	0
Total assets	$ 10,153	$ 6,995