Goodwill and Other Intangible Assets (Details) - USD ($)	12 Months Ended
	Jun. 27, 2015	Jun. 28, 2014
Changes in goodwill
Balance at the beginning of the period	$ 5,900,000	$ 0
Currency translation and other adjustments	(300,000)	100,000
Balance at the end of the period	5,600,000	5,900,000
Impairment charges	0	0
Time-Bandwidth Products AG (Time-Bandwidth)
Changes in goodwill
Goodwill acquired from acquisition		5,800,000
Optical Communications
Changes in goodwill
Balance at the beginning of the period	0	0
Currency translation and other adjustments	0	0
Balance at the end of the period	0	0
Commercial Lasers
Changes in goodwill
Balance at the beginning of the period	5,900,000	0
Currency translation and other adjustments	(300,000)	100,000
Balance at the end of the period	$ 5,600,000	5,900,000
Commercial Lasers | Time-Bandwidth Products AG (Time-Bandwidth)
Changes in goodwill
Goodwill acquired from acquisition		$ 5,800,000