Fair Value - Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Aug. 01, 2021	May 02, 2021	Aug. 02, 2020
U.S. Government Money Market Fund [Member]
Assets:
Investments at fair value	$ 8,205
Premier Money Market Fund [Member]
Assets:
Investments at fair value		$ 7,879	$ 7,533
Bond Mutual Funds [Member]
Assets:
Investments at fair value	4,656	4,101	983
Inflation Protected Bond Mutual Funds [Member]
Assets:
Investments at fair value	2,979	722
Mortgage Securities Mutual Funds [Member]
Assets:
Investments at fair value	1,124	719
Large Cap Equity Mutual Funds [Member]
Assets:
Investments at fair value	708
Growth Allocation Mutual Funds [Member]
Assets:
Investments at fair value	419	339	246
U.S. Event Driven Equity Mutual Fund [Member]
Assets:
Investments at fair value	194
Moderate Allocation Mutual Fund [Member]
Assets:
Investments at fair value	91	86	71
Other [Member]
Assets:
Investments at fair value	163	111	66
Quoted prices in active markets for identical assets - Level 1 [Member] | U.S. Government Money Market Fund [Member]
Assets:
Investments at fair value	8,205
Quoted prices in active markets for identical assets - Level 1 [Member] | Premier Money Market Fund [Member]
Assets:
Investments at fair value		7,879	7,533
Quoted prices in active markets for identical assets - Level 1 [Member] | Bond Mutual Funds [Member]
Assets:
Investments at fair value	4,656	4,101	983
Quoted prices in active markets for identical assets - Level 1 [Member] | Inflation Protected Bond Mutual Funds [Member]
Assets:
Investments at fair value	2,979	722
Quoted prices in active markets for identical assets - Level 1 [Member] | Mortgage Securities Mutual Funds [Member]
Assets:
Investments at fair value	1,124	719
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] | Growth Allocation Mutual Funds [Member]
Assets:
Investments at fair value	419	339	246
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	91	86	71
Quoted prices in active markets for identical assets - Level 1 [Member] | Other [Member]
Assets:
Investments at fair value	$ 163	$ 111	$ 66