Stockholders' Equity - Schedule of Outstanding Stock Options, Excluding Performance Based Options (Detail) (USD $)	12 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011	Nov. 01, 2010
Schedule Of Stock Option Activity [Line Items]
Options Outstanding, Shares	8,829,618	12,325,499	13,399,381	12,731,430
Options Outstanding, Weighted Average Remaining Life	5 years 4 months 24 days
Options Outstanding, Weighted Average Exercise Price	$ 4.83	$ 4.49	$ 4.40	$ 4.48
Option Exercisable, Shares	6,044,792	7,903,327	6,042,873
Options Exercisable, Weighted Average Exercise Price	$ 4.72	$ 4.94	$ 5.64
Range One [Member]
Schedule Of Stock Option Activity [Line Items]
Options Outstanding, Shares	1,921,001
Options Outstanding, Weighted Average Remaining Life	5 years 7 months 6 days
Options Outstanding, Weighted Average Exercise Price	$ 2.05
Option Exercisable, Shares	1,921,001
Options Exercisable, Weighted Average Exercise Price	$ 2.05
Range Two [Member]
Schedule Of Stock Option Activity [Line Items]
Options Outstanding, Shares	1,996,750
Options Outstanding, Weighted Average Remaining Life	6 years 4 months 24 days
Options Outstanding, Weighted Average Exercise Price	$ 3.19
Option Exercisable, Shares	1,341,748
Options Exercisable, Weighted Average Exercise Price	$ 3.43
Range Three [Member]
Schedule Of Stock Option Activity [Line Items]
Options Outstanding, Shares	3,152,867
Options Outstanding, Weighted Average Remaining Life	5 years 6 months
Options Outstanding, Weighted Average Exercise Price	$ 5.35
Option Exercisable, Shares	1,548,043
Options Exercisable, Weighted Average Exercise Price	$ 5.26
Range Four [Member]
Schedule Of Stock Option Activity [Line Items]
Options Outstanding, Shares	645,000
Options Outstanding, Weighted Average Remaining Life	7 years 10 months 24 days
Options Outstanding, Weighted Average Exercise Price	$ 6.96
Option Exercisable, Shares	120,000
Options Exercisable, Weighted Average Exercise Price	$ 7.58
Range Five [Member]
Schedule Of Stock Option Activity [Line Items]
Options Outstanding, Shares	859,500
Options Outstanding, Weighted Average Remaining Life	1 year 1 month 6 days
Options Outstanding, Weighted Average Exercise Price	$ 8.85
Option Exercisable, Shares	859,500
Options Exercisable, Weighted Average Exercise Price	$ 8.85
Range Six [Member]
Schedule Of Stock Option Activity [Line Items]
Options Outstanding, Shares	254,500
Options Outstanding, Weighted Average Remaining Life	1 year 4 months 24 days
Options Outstanding, Weighted Average Exercise Price	$ 13.16
Option Exercisable, Shares	254,500
Options Exercisable, Weighted Average Exercise Price	$ 13.16
Minimum [Member] | Range One [Member]
Schedule Of Stock Option Activity [Line Items]
Range of Exercise Prices, Minimum	$ 1.04
Minimum [Member] | Range Two [Member]
Schedule Of Stock Option Activity [Line Items]
Range of Exercise Prices, Minimum	$ 2.35
Minimum [Member] | Range Three [Member]
Schedule Of Stock Option Activity [Line Items]
Range of Exercise Prices, Minimum	$ 4.61
Minimum [Member] | Range Four [Member]
Schedule Of Stock Option Activity [Line Items]
Range of Exercise Prices, Minimum	$ 6.65
Minimum [Member] | Range Five [Member]
Schedule Of Stock Option Activity [Line Items]
Range of Exercise Prices, Minimum	$ 8.71
Minimum [Member] | Range Six [Member]
Schedule Of Stock Option Activity [Line Items]
Range of Exercise Prices, Minimum	$ 10.76
Maximum [Member] | Range One [Member]
Schedule Of Stock Option Activity [Line Items]
Range of Exercise Prices, Maximum	$ 2.34
Maximum [Member] | Range Two [Member]
Schedule Of Stock Option Activity [Line Items]
Range of Exercise Prices, Maximum	$ 4.60
Maximum [Member] | Range Three [Member]
Schedule Of Stock Option Activity [Line Items]
Range of Exercise Prices, Maximum	$ 6.64
Maximum [Member] | Range Four [Member]
Schedule Of Stock Option Activity [Line Items]
Range of Exercise Prices, Maximum	$ 8.70
Maximum [Member] | Range Five [Member]
Schedule Of Stock Option Activity [Line Items]
Range of Exercise Prices, Maximum	$ 10.75
Maximum [Member] | Range Six [Member]
Schedule Of Stock Option Activity [Line Items]
Range of Exercise Prices, Maximum	$ 16.36