Fair Value - Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Jul. 31, 2022	May 01, 2022	Aug. 01, 2021
U.S. Government Money Market Fund [Member]
Assets:
Investments at fair value	$ 8,853	$ 8,683	$ 8,205
Large Cap Equity Mutual Funds [Member]
Assets:
Investments at fair value			708
U.S. Event Driven Equity Mutual Fund [Member]
Assets:
Investments at fair value			194
Moderate Allocation Mutual Fund [Member]
Assets:
Investments at fair value	82	81	91
Other [Member]
Assets:
Investments at fair value	168	158	163
Growth Allocation Mutual Funds [Member]
Assets:
Investments at fair value	464	435	419
Bond Mutual Funds [Member]
Assets:
Investments at fair value			4,656
Inflation Protected Bond Mutual Funds [Member]
Assets:
Investments at fair value			2,979
Mortgage Securities Mutual Funds [Member]
Assets:
Investments at fair value			1,124
Quoted prices in active markets for identical assets - Level 1 [Member] | U.S. Government Money Market Fund [Member]
Assets:
Investments at fair value	8,853	8,683	8,205
Quoted prices in active markets for identical assets - Level 1 [Member] | Large Cap Equity Mutual Funds [Member]
Assets:
Investments at fair value			708
Quoted prices in active markets for identical assets - Level 1 [Member] | U.S. Event Driven Equity Mutual Fund [Member]
Assets:
Investments at fair value			194
Quoted prices in active markets for identical assets - Level 1 [Member] | Moderate Allocation Mutual Fund [Member]
Assets:
Investments at fair value	82	81	91
Quoted prices in active markets for identical assets - Level 1 [Member] | Other [Member]
Assets:
Investments at fair value	168	158	163
Quoted prices in active markets for identical assets - Level 1 [Member] | Growth Allocation Mutual Funds [Member]
Assets:
Investments at fair value	$ 464	$ 435	419
Quoted prices in active markets for identical assets - Level 1 [Member] | Bond Mutual Funds [Member]
Assets:
Investments at fair value			4,656
Quoted prices in active markets for identical assets - Level 1 [Member] | Inflation Protected Bond Mutual Funds [Member]
Assets:
Investments at fair value			2,979
Quoted prices in active markets for identical assets - Level 1 [Member] | Mortgage Securities Mutual Funds [Member]
Assets:
Investments at fair value			$ 1,124