Revenue (Disaggregation of Revenue) (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jul. 03, 2021	Apr. 03, 2021	Dec. 26, 2020	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jul. 03, 2021	Jun. 27, 2020	Jun. 29, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 132,629	$ 134,600	$ 128,262	$ 123,207	$ 116,018	$ 111,455	$ 116,722	$ 105,285	$ 518,698	$ 449,480	$ 464,044
Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Net sales									509,621	441,405	458,256
Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Net sales									$ 9,077	$ 8,075	$ 5,788