Operating Segment, Geographic Information and Significant Customers - Summary of Performance of Operations by Reportable Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	$ (57,089)	$ (50,932)	$ (111,150)	$ (101,658)
Adjusted EBITDA	10,707	5,237	18,710	8,560
MCE
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	(51,806)	(42,305)	(100,362)	(85,793)
MDS
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	(4,767)	(8,445)	(10,147)	(16,361)
Segment Reconciling Items [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	(516)	(182)	(641)	496
Intersegment Eliminations [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	995	2,733	1,636	3,847
Intersegment Eliminations [Member] | MCE
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	923	2,733	1,425	3,847
Intersegment Eliminations [Member] | MDS
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	72	0	211	0
Operating Segments [Member] | MCE
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	(52,729)	(45,038)	(101,787)	(89,640)
Adjusted EBITDA	10,510	4,082	17,799	6,425
Operating Segments [Member] | MDS
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	(4,839)	(8,445)	(10,358)	(16,361)
Adjusted EBITDA	284	1,066	770	2,128
Segment Reconciling Items and Intersegment Eliminations [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	479	2,551	995	4,343
Adjusted EBITDA	$ (87)	$ 89	$ 141	$ 7