BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Impact of ASU (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Apr. 01, 2018	Mar. 31, 2019	Apr. 01, 2018	Jul. 01, 2018	Jun. 30, 2018
Statement of Operations
Net Sales	$ 128,390	$ 93,811	$ 343,572	$ 237,295
Income before income tax expense	16,597	14,302	39,967	34,518
Income tax expense	3,834	2,848	8,552	8,009
Net income	12,763	$ 11,454	31,415	$ 26,509
Balance Sheet
Accrued expenses and other current liabilities	42,337		42,337		$ 31,895	$ 27,866
Income taxes	3,963		3,963
Accumulated deficit	(33,393)		(33,393)		(64,808)	$ (61,717)
Adjustments Due to ASC 606
Statement of Operations
Net Sales	(611)		570
Income before income tax expense	(611)		570
Income tax expense	(123)		115
Net income	(488)		455
Balance Sheet
Accrued expenses and other current liabilities	(4,599)		(4,599)		4,029
Income taxes	1,053		1,053
Accumulated deficit	3,546		3,546		$ (3,091)
Balances without adoption of ASC 606
Statement of Operations
Net Sales	127,779		344,142
Income before income tax expense	15,986		40,537
Income tax expense	3,711		8,667
Net income	12,275		31,870
Balance Sheet
Accrued expenses and other current liabilities	37,738		37,738
Income taxes	5,016		5,016
Accumulated deficit	$ (29,847)		$ (29,847)