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Fair Value Measurements (Details) - USD ($) $ in Thousands	Jan. 27, 2024	Apr. 29, 2023
Assets
Total assets	$ 20,835	$ 24,903
Recurring basis
Assets
Marketable securities	19,531	23,552
Held-to-maturity investments	1,304	1,351
Total assets	20,835	24,903
Recurring basis | Level 1
Assets
Marketable securities	0	0
Held-to-maturity investments	1,304	1,351
Total assets	1,304	1,351
Recurring basis | Level 2
Assets
Marketable securities	9,026	16,557
Held-to-maturity investments	0	0
Total assets	9,026	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	10,505	6,995
Held-to-maturity investments	0	0
Total assets	$ 10,505	$ 6,995

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Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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Amount of investment in marketable security.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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