Revenue Disaggregation of Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 28, 2019	Dec. 29, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 116,722	$ 123,037	$ 222,007	$ 250,509
Over-Time
Disaggregation of Revenue [Line Items]
Net sales	115,118	122,137	219,144	248,518
Point-in-Time
Disaggregation of Revenue [Line Items]
Net sales	$ 1,604	$ 900	$ 2,863	$ 1,991