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Income Taxes (Effective Tax Rate Reconciliation) (Detail) - USD ($) | 12 Months Ended
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Jun. 27, 2020 | Jun. 29, 2019 | Jun. 30, 2018
Income Tax Disclosure [Abstract] |  |  |
Federal income tax provision (benefit) at statutory rates | $ 907,000 | $ (1,836,000) | $ (397,000)
State income taxes, net of federal tax effect | 90,000 | (158,000) | (4,000)
Foreign tax rate differences | 336,000 | 251,000 | 103,000
Tax rate change | 0 | 0 | 1,634,000
Provisional transition tax on accumulated foreign earnings | 0 | (384,000) | 1,190,000
Effect of income tax credits | (310,000) | (861,000) | (687,000)
Previously unrecognized tax benefits | (1,345,000) | 0 | 0
Effect of repatriation of foreign earnings, net | 0 | (42,000) | (1,484,000)
Goodwill write-off | 0 | 1,726,000 | 0
Global Intangible Low-Taxed Income (GILTI) tax | 0 | 150,000 | 0
Provision to return reconciliation | (241,000) | 630,000 | (401,000)
Other | 124,000 | (234,000) | (71,000)
Total income tax benefit | $ (439,000) | $ (758,000) | $ (117,000)

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