ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES - Correction of Errors to Accrued Warranty Liability (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Apr. 01, 2018	Mar. 31, 2019	Apr. 01, 2018
Out-of-period adjustments
Revenue	$ 128,390	$ 93,811	$ 343,572	$ 237,295
Increase (decrease) in accrued expenses and other current liabilities			$ 7,732	$ 5,736
Product warranty term	5 years
Correction of Error in Accrued Warranty Calculation, Net
Out-of-period adjustments
Revenue	$ (225)
Increase (decrease) in accrued expenses and other current liabilities	225
Correction of Error in Accrued Warranty Calculation, Inaccurate Data on Cost of Parts
Out-of-period adjustments
Revenue	1,125
Increase (decrease) in accrued expenses and other current liabilities	(1,125)
Correction of Error in Accrued Warranty Calculation, Assumptions Used In Change in Warranty Period
Out-of-period adjustments
Revenue	(1,350)
Increase (decrease) in accrued expenses and other current liabilities	$ 1,350