Earnings per Share and Stock-Based Compensation - Reconciliation of Denominator of Each Net Loss Per Share (Parenthetical) (Detail)	3 Months Ended
	Jan. 31, 2013	Jan. 31, 2012
Dilutive stock options and restricted stock [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Shares outstanding were excluded from calculation of diluted EPS	3,391,000	3,755,000
Additional shares outstanding were excluded from calculation of diluted EPS	7,932,000	10,774,000
Dilutive stock warrants [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Shares outstanding were excluded from calculation of diluted EPS	15,140,000	12,195,000
Additional shares outstanding were excluded from calculation of diluted EPS	10,514,000	13,459,000