Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Income Tax Disclosure [Abstract]
Deferred income tax valuation allowance	$ 11,120	$ 10,652
Net deferred tax assets	0	$ 2,322
Net operating loss carry-forward	$ 11,600
Net operating loss carryforward expiration year	2024