Income Taxes (Effective Tax Rate Reconciliation) (Detail) - USD ($)	12 Months Ended
	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)