Operating Segment, Geographic Information and Significant Customers - Geographic Distribution of Revenues and Long Lived Assets from Continuing Operations (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues to unaffiliated customers									$ 654,744	$ 493,184	$ 408,588
Inter-geographic revenues									0	0	0
Net revenues	$ 176,963	$ 174,636	$ 159,089	$ 144,056	$ 152,867	$ 116,336	$ 117,912	$ 106,069	654,744	493,184	408,588
Identifiable long-lived assets	50,980				51,643				60,001	50,980	51,643
US
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues									580,935	410,050	341,699
Reportable Geographical Components | US
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues to unaffiliated customers									599,422	450,218	380,538
Inter-geographic revenues									10,570	10,650	7,637
Net revenues									609,992	460,868	388,175
Identifiable long-lived assets	47,997				50,340				54,952	47,997	50,340
Reportable Geographical Components | Europe
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues to unaffiliated customers									49,332	35,000	22,242
Inter-geographic revenues									1,343	925	44
Net revenues									50,675	35,925	22,286
Identifiable long-lived assets	2,974				1,288				5,037	2,974	1,288
Reportable Geographical Components | Asia Pacific
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues to unaffiliated customers									5,990	7,966	5,808
Inter-geographic revenues									0	0	0
Net revenues									5,990	7,966	5,808
Identifiable long-lived assets	9				15				12	9	15
Geography Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues to unaffiliated customers									0	0	0
Inter-geographic revenues									(11,913)	(11,575)	(7,681)
Net revenues									(11,913)	(11,575)	(7,681)
Identifiable long-lived assets	$ 0				$ 0				$ 0	$ 0	$ 0