Schedule II (Consolidated Valuation And Qualifying Accounts) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 30, 2018
Provision for obsolete inventory
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	$ 1,792	$ 1,458	$ 1,306
Provisions	136	91	31
Dispositions	40	243	121
Balance at end of year	1,968	1,792	1,458
Allowance for Doubtful Accounts
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	58	0	84
Provisions	551	58	(84)
Dispositions	0	0	0
Balance at end of year	$ 609	$ 58	$ 0