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Net Income (Loss) Per Share - Schedule of Weighted-Average Shares Used for Net Income (Loss) per Share (Parenthetical) (Detail) - Common Stock [Member] - $ / shares
May 05, 2018
Jun. 30, 2015
Jun. 30, 2014
Convertible Senior Notes Due 2019 [Member]      
Earnings Per Share Diluted [Line Items]      
Conversion price per share $ 116.09   $ 116.09
Convertible Senior Notes Due 2020 [Member]      
Earnings Per Share Diluted [Line Items]      
Conversion price per share $ 118.13 $ 118.13