Fair Value Measurements - Hierarchy and Transfers (Details) - USD ($) $ in Thousands	Jul. 29, 2023	Apr. 29, 2023
Assets
Total assets	$ 23,858	$ 24,903
Recurring basis
Assets
Marketable securities	22,509	23,552
Held-to-maturity investments	1,349	1,351
Total assets	23,858	24,903
Recurring basis | Level 1
Assets
Marketable securities	0	0
Held-to-maturity investments	1,349	1,351
Total assets	1,349	1,351
Recurring basis | Level 2
Assets
Marketable securities	11,815	16,557
Held-to-maturity investments	0	0
Total assets	11,815	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	10,694	6,995
Held-to-maturity investments	0	0
Total assets	$ 10,694	$ 6,995