Significant Accounting Policies - Reconciliation of Denominator of Each Net Loss Per Share (Detail) 2 - shares	12 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013
Stock Options and Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares outstanding excluded from the calculation of diluted EPS	201,000	2,145,000	3,862,000
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares outstanding excluded from the calculation of diluted EPS	0	17,024,000	17,792,000
Stock Options and Restricted Stock - Out of the Money [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares outstanding excluded from the calculation of diluted EPS	14,954,000	4,856,000	5,409,000
Warrant - Out of the Money [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares outstanding excluded from the calculation of diluted EPS	25,654,000	8,630,000	7,862,000