Note 15 - Stock Plans (Details Textual) $ / shares in Units, $ in Thousands	12 Months Ended
Oct. 31, 2019 USD ($) $ / shares shares	Oct. 31, 2018 USD ($) $ / shares shares	Oct. 31, 2017 USD ($) $ / shares shares
Share-based Payment Arrangement, Expense \| $	$ 700	$ 3,700	$ 600
Share-based Payment Arrangement, Expense, after Tax \| $		2,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Installments	4
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value \| $		$ 26	$ 12
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value \| $	$ 0
Share-based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit \| $ / shares	$ 7.85
Share-based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit \| $ / shares	157
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value \| $ / shares	4.46	$ 27.09	$ 33.28
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price \| $ / shares	$ 36.07	$ 69.56	$ 65.24
Share-based Compensation Arrangement by Share-based Payment Award, Participants Years of Service	15 years
Share-based Payment Arrangement, Noncash Expense, Total \| $	$ 721	$ 3,669	$ 557
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	22,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total \| $	$ 4,200
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 292 days
Nonemployee Director [Member]
Number of Directors	6
Share-based Payment Arrangement, Option [Member]
Share-based Payment Arrangement, Expense \| $	$ 800	$ 700	500
Performance Shares, Including LTIP [Member]
Share-based Compensation, Reverse of Previously Recognized Expense \| $	2,600		2,000
Restricted Stock [Member]
Share-based Payment Arrangement, Expense \| $	$ 2,400		$ 2,100
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	107,650	20,292	14,662
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	656		18,100
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other Than Options Vested, Number	33,643	21,609	12,497
Restricted Stock [Member] \| Prior Period [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	8,380	5,936	4,055
Restricted Stock [Member] \| Participants With Service Requirement [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Participants Age	58 years
Restricted Stock [Member] \| Nonemployee Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Installments	3
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	103,612	15,904	11,937
Restricted Stock [Member] \| Participants Without Service Requirement [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Participants Age	60 years
Awards Other Than Options [Member]
Share-based Payment Arrangement, Noncash Expense, Total \| $	$ 200	$ 2,800	$ 21
Target 2018 LTIP Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	30,277
Target 2016 LTIP Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	4,439
Time-based Market Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance	98,550
Time-based Market Share Units [Member] \| Fiscal Year 2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	56,400
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Adjustment for Shares Grants in Previous Period	16,450
Performance-based Market Share Units [Member]
Share-based Compensation, Reverse of Previously Recognized Expense \| $	$ 2,600
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance	101,600
Performance-based Market Share Units [Member] \| Fiscal Year 2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	56,400
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Adjustment for Shares Grants in Previous Period	12,836
Performance-based Market Share Units [Member] \| Fiscal Year 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	1,158
Market Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Installments	4
Share-based Compensation Arrangement By Share-based Compensation Award Fair Value Measurement Period	60 days
Market Stock Units [Member] \| Two Year [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate			1.35%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	62.51%	48.41%	57.93%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	0.00%	0.00%	0.00%
Market Stock Units [Member] \| Two and a Half Year [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	1.80%	2.56%	1.43%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	59.60%	51.92%	54.61%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	0.00%	0.00%	0.00%
Market Stock Units [Member] \| Three Year [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate			1.49%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	57.04%	56.11%	52.66%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	0.00%	0.00%	0.00%
Market Stock Units [Member] \| Four Year [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	1.81%	2.68%	1.63%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	60.03%	52.59%	48.85%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	0.00%	0.00%	0.00%
Market Stock Units [Member] \| Five Year [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate			1.76%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	56.86%	49.57%	50.78%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	0.00%	0.00%	0.00%
Market Stock Units [Member] \| Minimum [Member]
Percentage of Target Number of Shares Covered by MSU Awards	0.00%
Market Stock Units [Member] \| Maximum [Member]
Percentage of Target Number of Shares Covered by MSU Awards	200.00%
Performance Based MSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Installments	4
Performance Based MSUs [Member] \| Share-based Payment Arrangement, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	50.00%
Equity Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	1.99%	2.80%	2.05%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	0.56%	0.50%	0.53%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	7 years 357 days	8 years	7 years 233 days
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Estimated Forfeiture Rate	7.84%	9.90%	9.92%

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The percentage of the target number of shares covered by the MSU awards.

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The adjustment in the current year to shares granted in a prior year.

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Age that a participant must reach, in some cases along with a minimum service requirement, to vest in restricted stock awards after one year.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Number of shares authorized for issuance under share-based payment arrangement.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of shares issued under share-based payment arrangement.

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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.

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Percentage of vesting of award under share-based payment arrangement.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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