Note 15 - Stock Plans (Details Textual) $ / shares in Units, $ in Thousands	12 Months Ended
Oct. 31, 2021 USD ($) $ / shares shares	Oct. 31, 2020 USD ($) $ / shares shares	Oct. 31, 2019 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)	0	0	110,975
Share-based Payment Arrangement, Expense \| $	$ 7,700	$ 2,800	$ 700
Share-based Payment Arrangement, Expense, after Tax \| $	$ 5,200	$ 2,600
Share-based Compensation Arrangement by Share-based Payment Award, Number of Installments	4
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)	10 years
Share-based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit (in dollars per share) \| $ / shares	$ 7.85
Share-based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit (in dollars per share) \| $ / shares	$ 157.00
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value \| $	$ 4,800
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)	77,607	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) \| $ / shares			$ 4.46
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price (in dollars per share) \| $ / shares	$ 8.82	$ 25.34	$ 36.07
Share-based Compensation Arrangement by Share-based Payment Award, Participants Years of Service (Year)	15 years
Share-based Payment Arrangement, Noncash Expense, Total \| $	$ 7,668	$ 2,779	$ 721
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)	300,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total \| $	$ 12,500
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	1 year 9 months 18 days
Nonemployee Director [Member]
Number of Directors	5
Share-based Compensation Arrangement by Share-based Payment Award, Post-vesting Holding Period (Year)		2 years
Share-based Payment Arrangement, Option [Member]
Share-based Payment Arrangement, Expense, after Tax \| $	$ 200	$ 400	800
Restricted Stock [Member]
Share-based Compensation, Reverse of Previously Recognized Expense \| $		$ 2,400	$ 2,600
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period (in shares)	25,499	142,231	107,650
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares)	4,875	5,567	656
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other Than Options Vested, Number (in shares)	76,311	60,446	33,643
Restricted Stock [Member] \| Prior Period [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period (in shares)	13,732	11,503	8,380
Restricted Stock [Member] \| Participants With Service Requirement [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Participants Age (Year)	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 (in shares)	8,199	36,731	103,612
Restricted Stock [Member] \| Participants Without Service Requirement [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Participants Age (Year)	60 years
Awards Other Than Options [Member]
Share-based Payment Arrangement, Noncash Expense, Total \| $	$ 7,400	$ 2,400
Share-based Payment Arrangement, Noncash Income \| $			$ 200
Performance-based Performance Share Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	0.16%	0.19%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	112.44%	108.15%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares)	186,136	186,136
Time-based Market Share Units [Member]
Share-based Compensation, Reverse of Previously Recognized Expense \| $		$ 2,400
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares)			55,050
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			42,300
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Adjustment for Shares Grants in Previous Period (in shares)		16,700
Performance-based Market Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares)			67,025
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			56,400
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Adjustment for Shares Grants in Previous Period (in shares)		20,350
Market Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Installments		4
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	0	0
Share-based Compensation Arrangement By Share-based Compensation Award Fair Value Measurement Period (Day)		60 days
Market Stock Units [Member] \| Two Year [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate			62.51%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate			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%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate			59.60%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate			0.00%
Market Stock Units [Member] \| Three Year [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate			57.04%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate			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%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate			60.03%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate			0.00%
Market Stock Units [Member] \| Five Year [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate			56.86%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate			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%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate			0.56%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term (Year)			7 years 11 months 23 days
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Estimated Forfeiture Rate			7.84%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate			0.00%

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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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The number of vested, restricted stock shares which were deferred at the associates' election at the end of the period.

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Share-based compensation arrangement by share-based payment award, fair value assumptions, estimated forfeiture rat

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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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Number of years of service that a participant must attain, along with a minimum age requirement, to vest in restricted stock awards after one year.

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Represents the total stock-based compensation of income that was a reverse of previously recognized expense.

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Amount of noncash income for share-based payment arrangement.

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Amount, after tax, of expense for award under share-based payment arrangement.

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

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Weighted-average period over which cost not yet recognized is expected to be recognized for 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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Amount of noncash expense for share-based payment arrangement.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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

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Gross number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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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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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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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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Number of share options (or share units) exercised during the current period.

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