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Significant Accounting Policies - Reconciliation of Denominator of Each Net Loss Per Share (Detail) - shares
shares in Thousands
12 Months Ended
Oct. 31, 2015
Oct. 31, 2014
Oct. 31, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Shares used in computing basic net loss per share 171,494 170,492 167,255
Shares used in computing diluted net loss per share 171,494 170,492 167,255
Stock Options and Restricted Stock [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Dilutive effect of stock 0 0 0
Warrant [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Dilutive effect of stock 0 0 0