Enterprise-Wide Disclosures (Net Sales And Long-Lived Assets (Property, Plant, And Equipment) By Geographic Area) (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 27, 2020	Jun. 29, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Revenues	$ 116,018	$ 111,455	$ 116,722	$ 105,285	$ 105,581	$ 107,954	$ 123,037	$ 127,472	$ 449,480	$ 464,044	$ 446,322
Long-lived assets	31,764				29,413				31,764	29,413	27,548
Domestic (U.S.)
Segment Reporting Information [Line Items]
Revenues									338,766	357,341	329,230
Long-lived assets	9,213				9,658				9,213	9,658	7,454
Foreign
Segment Reporting Information [Line Items]
Revenues									110,714	106,703	117,092
Mexico
Segment Reporting Information [Line Items]
Long-lived assets	19,325				17,781				19,325	17,781	19,395
Vietnam
Segment Reporting Information [Line Items]
Long-lived assets	2,644				1,220				2,644	1,220	0
China
Segment Reporting Information [Line Items]
Long-lived assets	$ 582				$ 754				$ 582	$ 754	$ 699