Fair Value - Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Jan. 30, 2022	May 02, 2021	Jan. 31, 2021
U.S. Government Money Market Fund [Member]
Assets:
Investments at fair value	$ 8,531
Premier Money Market Fund [Member]
Assets:
Investments at fair value		$ 7,879	$ 7,771
Mortgage Securities Mutual Funds [Member]
Assets:
Investments at fair value		719
Large Cap Equity Mutual Funds [Member]
Assets:
Investments at fair value	74
Moderate Allocation Mutual Fund [Member]
Assets:
Investments at fair value	86	86	80
Other [Member]
Assets:
Investments at fair value	259	111	82
Bond Mutual Funds [Member]
Assets:
Investments at fair value	267	4,101	2,655
Growth Allocation Mutual Funds [Member]
Assets:
Investments at fair value	444	339	299
Inflation Protected Bond Mutual Funds [Member]
Assets:
Investments at fair value		722	2,893
Quoted prices in active markets for identical assets - Level 1 [Member] | U.S. Government Money Market Fund [Member]
Assets:
Investments at fair value	8,531
Quoted prices in active markets for identical assets - Level 1 [Member] | Premier Money Market Fund [Member]
Assets:
Investments at fair value		7,879	7,771
Quoted prices in active markets for identical assets - Level 1 [Member] | Mortgage Securities Mutual Funds [Member]
Assets:
Investments at fair value		719
Quoted prices in active markets for identical assets - Level 1 [Member] | Large Cap Equity Mutual Funds [Member]
Assets:
Investments at fair value	74
Quoted prices in active markets for identical assets - Level 1 [Member] | Moderate Allocation Mutual Fund [Member]
Assets:
Investments at fair value	86	86	80
Quoted prices in active markets for identical assets - Level 1 [Member] | Other [Member]
Assets:
Investments at fair value	259	111	82
Quoted prices in active markets for identical assets - Level 1 [Member] | Bond Mutual Funds [Member]
Assets:
Investments at fair value	267	4,101	2,655
Quoted prices in active markets for identical assets - Level 1 [Member] | Growth Allocation Mutual Funds [Member]
Assets:
Investments at fair value	$ 444	339	299
Quoted prices in active markets for identical assets - Level 1 [Member] | Inflation Protected Bond Mutual Funds [Member]
Assets:
Investments at fair value		$ 722	$ 2,893