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Income Taxes - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]        
(Provision for) benefit from taxes $ 0 $ (40,000) $ 1,376,000 $ (405,000)