CASH AND CASH EQUIVALENTS - Schedule of cash and cash equivalents (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Cash And Cash Equivalents [Abstract]
Cash	$ 65,091	$ 45,117
Money market funds	448	3,965
Total cash and cash equivalents	$ 65,539	$ 49,082	$ 35,364	$ 64,461