Other Intangible Assets - Additional Information (Detail) - USD ($)		12 Months Ended
	Jul. 23, 2012	Jul. 01, 2017	Jul. 02, 2016	Jun. 27, 2015	Oct. 27, 2014
Goodwill And Other Intangible Assets [Line Items]
Impairment of other intangible assets		$ 0	$ 0
Amortization of other intangible assets		$ 786,000	$ 995,000	$ 1,133,000
Opnext
Goodwill And Other Intangible Assets [Line Items]
Other intangible assets acquired	$ 16,400,000
Opnext | Developed Technology
Goodwill And Other Intangible Assets [Line Items]
Other intangible assets acquired	$ 8,700,000
Estimated useful life of acquired tangible assets	6 years
Opnext | Contract Backlog
Goodwill And Other Intangible Assets [Line Items]
Other intangible assets acquired	$ 200,000
Estimated useful life of acquired tangible assets	1 year
Opnext | Customer Relationships
Goodwill And Other Intangible Assets [Line Items]
Other intangible assets acquired	$ 4,900,000
Estimated useful life of acquired tangible assets	11 years
Opnext | Trademarks and Other
Goodwill And Other Intangible Assets [Line Items]
Other intangible assets acquired	$ 2,700,000
Estimated useful life of acquired tangible assets	6 years
Komoro
Goodwill And Other Intangible Assets [Line Items]
Other intangible assets transferred					$ 4,400,000