Note 16 - Stock Plans (Details) - Stock Options Outstanding and Exercisable (USD $)	12 Months Ended
Oct. 31, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower limit exercise price	$ 1.93
Upper limit exercise price	$ 60.36
Number outstanding (in Shares)	6,720,251
Weighted-average exercise price - outstanding	$ 5.23
Weighted-average remaining contractual life - outstanding	6 years 40 days
Number exercisable (in Shares)	4,100,413
Weighted-average exercise price - exercisable	$ 5.88
Weighted-average remaining contractual life - exercisable	4 years 321 days
Range One [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower limit exercise price	$ 1.93
Upper limit exercise price	$ 5.00
Number outstanding (in Shares)	4,672,501
Weighted-average exercise price - outstanding	$ 3.07
Weighted-average remaining contractual life - outstanding	6 years 127 days
Number exercisable (in Shares)	2,940,163
Weighted-average exercise price - exercisable	$ 3.02
Weighted-average remaining contractual life - exercisable	5 years 200 days
Range Two [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower limit exercise price	$ 5.01
Upper limit exercise price	$ 10.00
Number outstanding (in Shares)	1,690,250
Weighted-average exercise price - outstanding	$ 6.37
Weighted-average remaining contractual life - outstanding	6 years 105 days
Number exercisable (in Shares)	802,750
Weighted-average exercise price - exercisable	$ 6.46
Weighted-average remaining contractual life - exercisable	3 years 244 days
Range Three [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower limit exercise price	$ 10.01
Upper limit exercise price	$ 20.00
Range Four [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower limit exercise price	$ 20.01
Upper limit exercise price	$ 30.00
Number outstanding (in Shares)	218,375
Weighted-average exercise price - outstanding	$ 21.73
Weighted-average remaining contractual life - outstanding	2 years 211 days
Number exercisable (in Shares)	218,375
Weighted-average exercise price - exercisable	$ 21.73
Weighted-average remaining contractual life - exercisable	2 years 211 days
Range Five [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower limit exercise price	$ 30.01
Upper limit exercise price	$ 40.00
Number outstanding (in Shares)	104,125
Weighted-average exercise price - outstanding	$ 32.33
Weighted-average remaining contractual life - outstanding	1 year 211 days
Number exercisable (in Shares)	104,125
Weighted-average exercise price - exercisable	$ 32.33
Weighted-average remaining contractual life - exercisable	1 year 211 days
Range Six [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower limit exercise price	$ 40.01
Upper limit exercise price	$ 50.00
Range Seven [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower limit exercise price	$ 50.01
Upper limit exercise price	$ 60.00
Number outstanding (in Shares)	30,000
Weighted-average exercise price - outstanding	$ 54.70
Weighted-average remaining contractual life - outstanding	131 days
Number exercisable (in Shares)	30,000
Weighted-average exercise price - exercisable	$ 54.70
Weighted-average remaining contractual life - exercisable	131 days
Range Eight [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower limit exercise price	$ 60.01
Upper limit exercise price	$ 70.00
Number outstanding (in Shares)	5,000
Weighted-average exercise price - outstanding	$ 60.36
Weighted-average remaining contractual life - outstanding	211 days
Number exercisable (in Shares)	5,000
Weighted-average exercise price - exercisable	$ 60.36
Weighted-average remaining contractual life - exercisable	211 days

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Weighted average remaining contractual term of exercisable stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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-Publisher FASB

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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