Earnings per Share and Stock-Based Compensation - Reconciliation of Denominator of Each Net Loss per Share (Parenthetical) (Detail)	3 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Dilutive Stock Options and Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded in computing diluted net loss per share	3,974,000	3,391,000
Additional shares excluded from calculation of diluted EPS	3,856,000	7,932,000
Dilutive Stock Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded in computing diluted net loss per share	19,913,000	15,140,000
Additional shares excluded from calculation of diluted EPS	5,741,000	10,514,000