Goodwill and Other Intangible Assets - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 30, 2017	Dec. 31, 2016	Jul. 01, 2017	Feb. 28, 2017
Goodwill [Line Items]
Goodwill	$ 11,600,000		$ 11,600,000		$ 11,400,000
Impairment charges			0
Amortization of acquired developed technologies	800,000	$ 1,800,000	1,600,000	$ 3,600,000
Optical Communications
Goodwill [Line Items]
Goodwill	$ 6,200,000		$ 6,200,000		$ 5,900,000
Private Company Acquisition | Optical Communications
Goodwill [Line Items]
Goodwill						$ 5,600,000