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Note 15 - Stock Plans (Details) - Stock Options Outstanding and Exercisable | 12 Months Ended
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Oct. 31, 2015 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Lower limit exercise price | $ 1.66
Upper limit exercise price | $ 32.33
Number outstanding (in Shares) | shares | 6,393,876
Weighted-average exercise price - outstanding | $ 4.78
Weighted-average remaining contractual life - oustanding | 5 years 65 days
Number exercisable (in Shares) | shares | 4,566,290
Weighted-average exercise price - exercisable | $ 4.96
Weighted-average remaining contractual life - exercisable | 4 years 94 days
Range One [Member] |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
Lower limit exercise price | $ 1.66
Upper limit exercise price | $ 5.00
Number outstanding (in Shares) | shares | 4,515,001
Weighted-average exercise price - outstanding | $ 3.03
Weighted-average remaining contractual life - oustanding | 5 years 135 days
Number exercisable (in Shares) | shares | 3,432,415
Weighted-average exercise price - exercisable | $ 3.04
Weighted-average remaining contractual life - exercisable | 4 years 270 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) | shares | 1,611,750
Weighted-average exercise price - outstanding | $ 6.36
Weighted-average remaining contractual life - oustanding | 5 years 105 days
Number exercisable (in Shares) | shares | 866,750
Weighted-average exercise price - exercisable | $ 6.44
Weighted-average remaining contractual life - exercisable | 3 years 102 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) | shares | 187,375
Weighted-average exercise price - outstanding | $ 21.78
Weighted-average remaining contractual life - oustanding | 1 year 215 days
Number exercisable (in Shares) | shares | 187,375
Weighted-average exercise price - exercisable | $ 21.78
Weighted-average remaining contractual life - exercisable | 1 year 215 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) | shares | 79,750
Weighted-average exercise price - outstanding | $ 32.33
Weighted-average remaining contractual life - oustanding | 200 days
Number exercisable (in Shares) | shares | 79,750
Weighted-average exercise price - exercisable | $ 32.33
Weighted-average remaining contractual life - exercisable | 200 days

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- Definition 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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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 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)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + References 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)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding. + References 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 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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 -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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