GEOGRAPHIC INFORMATION, PRODUCT GROUPS AND CUSTOMER CONCENTRATION INFORMATION - Revenues by Product Group (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 26, 2015	Dec. 27, 2014	Dec. 26, 2015	Dec. 27, 2014
Segment Information [Line Items]
Revenues	$ 94,129	$ 86,820	$ 181,679	$ 176,061
100 Gb/s transmission modules
Segment Information [Line Items]
Revenues	49,554	33,670	90,382	55,000
40 Gb/s transmission modules
Segment Information [Line Items]
Revenues	11,308	19,300	22,136	41,466
10 Gb/s and lower transmission modules
Segment Information [Line Items]
Revenues	33,267	32,005	69,161	70,231
Industrial and consumer
Segment Information [Line Items]
Revenues	$ 0	$ 1,845	$ 0	$ 9,364