Operations by Segments and Geographic Areas - Schedule of Revenue Based on Point of Sale (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from unaffiliated customers	$ 104,846	$ 95,195	$ 207,283	$ 186,491
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from unaffiliated customers	65,024	58,589	127,905	115,799
United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from unaffiliated customers	24,004	22,468	48,371	42,539
Switzerland [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from unaffiliated customers	9,614	9,148	19,607	18,533
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from unaffiliated customers	$ 6,204	$ 4,990	$ 11,400	$ 9,620