Fair Value - Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Apr. 28, 2024	Apr. 30, 2023
U.S. Government Money Market Fund [Member]
Assets:
Investments at fair value	$ 6,910	$ 7,649
Growth Allocation Mutual Funds [Member]
Assets:
Investments at fair value	691	528
Moderate Allocation Mutual Fund [Member]
Assets:
Investments at fair value	46	86
Other [Member]
Assets:
Investments at fair value	358	208
Quoted prices in active markets for identical assets - Level 1 [Member] | U.S. Government Money Market Fund [Member]
Assets:
Investments at fair value	6,910	7,649
Quoted prices in active markets for identical assets - Level 1 [Member] | Growth Allocation Mutual Funds [Member]
Assets:
Investments at fair value	691	528
Quoted prices in active markets for identical assets - Level 1 [Member] | Moderate Allocation Mutual Fund [Member]
Assets:
Investments at fair value	46	86
Quoted prices in active markets for identical assets - Level 1 [Member] | Other [Member]
Assets:
Investments at fair value	$ 358	$ 208