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Earnings per Share and Stock-based Compensation - Reconciliation of Denominator of Each Net Loss per Share-Additional Information (Detail)	3 Months Ended		6 Months Ended
	Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2015	Apr. 30, 2014
Dilutive Stock Options and Restricted Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded in computing diluted net loss per share	5,712,000	685,000	5,880,000	595,000
Additional shares excluded from calculation of diluted EPS	232,000	3,229,000	233,000	3,603,000
Dilutive Stock Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Additional shares excluded from calculation of diluted EPS	1,279,000	19,113,000	1,633,000	19,542,000

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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