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Share-Based Compensation (Detail) - USD ($)			3 Months Ended
Share-Based Compensation (Detail) - USD ($)	Jul. 24, 2020	Jul. 25, 2019	Sep. 26, 2020	Sep. 28, 2019	Jul. 23, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Share-based Compensation Expense			$ 500,000
Unrecognized Share-based Compensation, Period for Recognition			2 years 3 months 29 days
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
SARs Granted	155,000	175,000
Strike Price		$ 4.93			$ 6.94
Fair Value	$ 2.32	$ 1.23
Share-based Compensation Expense			$ 64,000	$ 74,000