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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of shares issued under share-based payment arrangement.

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Stock-Based Compensation (Deferred Stock) - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended				4 Months Ended	12 Months Ended
	Dec. 30, 2023	Oct. 07, 2023	Jul. 15, 2023	Jul. 16, 2022	Apr. 23, 2022	Dec. 30, 2023	Aug. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period						3 years
Non Employee Directors \| Annual Grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate shares elected to receive			59,400
Deferred Stock \| Non Employee Directors \| Annual Grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period						1 year
Aggregate shares elected to receive			15,900	58,300		5,780
Deferred Stock \| Non Employee Directors \| Prorated Portion of Annual Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares vested							1,980
Deferred Stock \| Two Newly Elected Non-employee Directors \| Prorated Portion of Annual Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate shares elected to receive		4,660
Deferred Stock Activity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to nonvested restricted stock granted by the EPIP	$ 0.6					$ 0.6
Expected weighted-average period to recognize compensation cost (years)						4 months 24 days
Total fair value of shares vested						$ 1.6
Retainer Conversion
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Retainers conversion into deferred shares						100.00%
Vesting period						1 year
Director Retainer Deferrals \| Deferred Stock \| Non Employee Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate shares elected to receive						14,249
Director Retainer Deferrals \| Deferred Stock \| Non Employee Directors \| Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate shares elected to receive	3,479				3,640