Fair Value of Financial Instruments - Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	May 02, 2021	May 03, 2020
Premier Money Market Fund [Member]
Assets:
Investments at fair value	$ 7,879	$ 7,496
Short Term Bond Mutual Funds [Member]
Assets:
Investments at fair value	4,101	923
Short Duration Inflation Protected Mutual Fund [Member]
Assets:
Investments at fair value	722
Mortgage Securities Mutual Fund [Member]
Assets:
Investments at fair value	719
Growth Allocation Mutual Funds [Member]
Assets:
Investments at fair value	339	219
Moderate Allocation Mutual Fund [Member]
Assets:
Investments at fair value	86	63
Other [Member]
Assets:
Investments at fair value	111	56
Quoted prices in active markets for identical assets - Level 1 [Member] | Premier Money Market Fund [Member]
Assets:
Investments at fair value	7,879	7,496
Quoted prices in active markets for identical assets - Level 1 [Member] | Short Term Bond Mutual Funds [Member]
Assets:
Investments at fair value	4,101	923
Quoted prices in active markets for identical assets - Level 1 [Member] | Short Duration Inflation Protected Mutual Fund [Member]
Assets:
Investments at fair value	722
Quoted prices in active markets for identical assets - Level 1 [Member] | Mortgage Securities Mutual Fund [Member]
Assets:
Investments at fair value	719
Quoted prices in active markets for identical assets - Level 1 [Member] | Growth Allocation Mutual Funds [Member]
Assets:
Investments at fair value	339	219
Quoted prices in active markets for identical assets - Level 1 [Member] | Moderate Allocation Mutual Fund [Member]
Assets:
Investments at fair value	86	63
Quoted prices in active markets for identical assets - Level 1 [Member] | Other [Member]
Assets:
Investments at fair value	$ 111	$ 56