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Net Loss Per Share (Additional Information) (Detail)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Earnings Per Share, Basic and Diluted [Abstract]        
Anti-dilutive common equivalent shares excluded from computation of diluted net income (loss) per share 12.1 14.7 12.1 15.0