COMMITMENTS AND CONTINGENCIES - Additional Information (Details) $ in Millions		1 Months Ended	6 Months Ended
	Nov. 24, 2016 patent	Oct. 31, 2015 installment	Dec. 30, 2017 USD ($)	Jul. 01, 2017 USD ($)
Contingencies And Commitments [Line Items]
Capital lease term		5 years
Number of capital lease installment payments | installment		20
Interest rate on capital lease (percent)		1.15%
Malaysian goods and services tax refund claim			$ 2.5
Number of allegedly infringed patents included in third party lawsuit which may incorporate Oclaro components | patent	7
Prepaid Expenses and Other Current Assets
Contingencies And Commitments [Line Items]
Malaysian goods and services tax refund claim			0.7
Inventory in Excess of Future Demand Forecasts | Accrued Expenses and Other Liabilities
Contingencies And Commitments [Line Items]
Purchase commitments			$ 6.8	$ 4.0
Minimum
Contingencies And Commitments [Line Items]
Warranty for products from date of sale			12 months
Maximum
Contingencies And Commitments [Line Items]
Warranty for products from date of sale			36 months