CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended			9 Months Ended
		Mar. 31, 2018		Mar. 31, 2017	Mar. 31, 2018		Mar. 31, 2017
Income Statement [Abstract]
Net sales		$ 185,998	[1]	$ 190,128	$ 542,482	[1]	$ 443,698
Cost of sales		158,302	[1]	147,809	440,833	[1]	339,735
Gross profit		27,696	[1]	42,319	101,649	[1]	103,963
Selling, general and administrative expenses		28,029	[1]	26,519	87,241	[1]	75,614
Impairment charges	[1]	256,266			256,266
Research and development expenses		2,471	[1]	2,607	6,208	[1]	4,998
Operating (loss) income		(259,070)	[1]	13,193	(248,066)	[1]	23,351
Other (expense) income:
Interest expense		(5,040)	[1]	(5,321)	(15,443)	[1]	(10,223)
Interest and other income, net		1,073	[1]	640	2,111	[1]	1,230
Other (expense) income, Total		(3,967)	[1]	(4,681)	(13,332)	[1]	(8,993)
(Loss) income before income taxes		(263,037)	[1]	8,512	(261,398)	[1]	14,358
Income tax provision		4,948	[1]	2,924	19,997	[1]	4,949
Net (loss) income		$ (267,985)	[1]	$ 5,588	$ (281,395)	[1]	$ 9,409
Basic (loss) income per common share (in dollars per share)		$ (7.59)	[1]	$ 0.16	$ (8.00)	[1]	$ 0.30
Diluted (loss) income per common share (in dollars per share)		$ (7.59)	[1]	$ 0.16	$ (8.00)	[1]	$ 0.30
Weighted average shares outstanding:
Basic (in shares)		35,304	[1]	34,769	35,162	[1]	31,453
Diluted (in shares)		35,304	[1]	35,121	35,162	[1]	31,792

[1] (as restated)