Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Commitment And Contingencies [Line Items]
Rent expense	$ 561	$ 791	$ 818
Minimum [Member]
Commitment And Contingencies [Line Items]
Operating lease obligations, noncancelable terms	1 year
Maximum [Member]
Commitment And Contingencies [Line Items]
Operating lease obligations, noncancelable terms	7 years