Stock Option And Benefit Plans (Narrative) (Detail) - USD ($) $ in Millions	12 Months Ended
Jun. 27, 2020	Jun. 29, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 0.3	$ 0.4	$ 0.4
Unrecognized share based compensation expense	$ 0.2
Share Based Expense Recognition - Weighted-average period	1 year 6 months 29 days
Company contributions to 401K	$ 0.8	$ 0.9	$ 0.8

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of contribution received by defined benefit plan from employer which increases plan assets.

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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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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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