Accrued Expenses - Schedule of Accrued Expenses (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Payables and Accruals [Abstract]
Clinical trial costs	$ 1,984	$ 1,678
Personnel costs	1,632	1,314
Professional fees	590	535
Other	18	56
Accrued expenses	$ 4,224	$ 3,583