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Income Taxes (Narrative) (Detail) - USD ($) | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2018 | Jul. 01, 2017 | Jul. 02, 2016 | Jun. 27, 2015
Income Tax Disclosure [Abstract] |  |  |  |  |
Tax Credit Carryforwards | $ 8,700,000 | $ 8,700,000 |  |  |
Tax Credit Carryforwards, R&D | 8,000,000 | $ 8,000,000 |  |  |
Accumulated unremitted earnings tax rate for cash repatriation |  | 15.50% |  |  |
Accumulated unremitted earnings tax rate for non liquid asset |  | 8.00% |  |  |
Provisional Toll Tax Liability | 400,000 | $ 1,200,000 |  |  |
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability |  | 1,300,000 |  |  |
Tax Benefit from Territorial Tax Conversion |  | 1,300,000 |  |  |
Estimated Federal And State Income Taxes And Potential Withholding Taxes | 800,000 | 800,000 |  |  |
Effect of repatriation of foreign earnings, net |  | $ 14,300,000 |  |  |
Remaining Contractual Term Of Tax Credit Expiration Date |  | 20 years |  |  |
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax | 726,000 | $ 726,000 |  |  |
Unrecognized Tax Benefits | $ 4,011,000 | $ 4,011,000 | $ 3,947,000 | $ 3,760,000 | $ 3,446,000

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