GEOGRAPHIC INFORMATION, PRODUCT GROUPS AND CUSTOMER CONCENTRATION INFORMATION - Revenues by Product Group (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 26, 2016	Mar. 28, 2015	Mar. 26, 2016	Mar. 28, 2015
Segment Information [Line Items]
Revenues	$ 101,050	$ 83,023	$ 282,729	$ 259,084
100 Gb/s transmission modules
Segment Information [Line Items]
Revenues	58,569	30,221	148,951	85,221
40 Gb/s and lower transmission modules
Segment Information [Line Items]
Revenues	42,481	52,802	133,778	164,499
Industrial and consumer
Segment Information [Line Items]
Revenues	$ 0	$ 0	$ 0	$ 9,364