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The annual compensation package for nonemployee directors.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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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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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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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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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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Amount by which current fair value of underlying stock exceeds exercise price of 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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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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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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

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

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Weighted average remaining contractual term for fully vested and expected to vest exercisable or convertible options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. 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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Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

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Note 7 - Stock-based Compensation and Equity Transactions (Details Textual) - USD ($)				3 Months Ended		6 Months Ended
	Jan. 10, 2022	Sep. 08, 2021	Jan. 12, 2021	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021	Sep. 15, 2020
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term (Year)				6 years 7 months 13 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term (Year)				5 years 10 months 2 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term (Year)				6 years 7 months 13 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value				$ 1,001,000		$ 1,001,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value				427,000		427,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value				993,000		993,000
Selling, General and Administrative Expenses [Member]
Share-Based Payment Arrangement, Expense				168,000	$ 137,000	307,000	$ 260,000
Share-Based Payment Arrangement, Nonemployee [Member]
Nonemployee Director, Annual Compensation		$ 50,000						$ 50,000
Restricted Stock [Member]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total				$ 523,000		$ 523,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)				1 year 4 months 9 days
Incentive Stock Options [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)						$ 3.84	$ 2.46
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total				$ 779,000		$ 779,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)				2 years 6 months 7 days
One Manager and Three Officers [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	39,666		33,500
One Manager and Three Officers [Member] \| Incentive Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)	106,001		67,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)	10 years
One Manager and Three Officers [Member] \| Restricted Stock and Incentive Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	4 years		4 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)			10 years
One Manager and Three Officers [Member] \| Restricted Stock and Incentive Stock Options [Member] \| Vesting on January 12, 2022 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage			25.00%
One Manager and Three Officers [Member] \| Restricted Stock and Incentive Stock Options [Member] \| Vesting on January 10, 2023 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	25.00%
Non-employee Directors and Chairperson of Committee on Board [Member]
Annual Payable, Additional Compensation								$ 15,000
Share Price, 20 Day Average (in dollars per share)		$ 8.21						$ 4.34
Non-employee Directors and Chairman of the Board [Member]
Annual Payable, Additional Compensation		$ 25,000
Non-employee Directors and Audit Committee Chair [Member]
Annual Payable, Additional Compensation		25,000
Non-employee Directors and Compensation Committee Chair [Member]
Annual Payable, Additional Compensation		20,000
Non-employee Directors and Strategic Planning and Capital Allocation Chair [Member]
Annual Payable, Additional Compensation		20,000
Non-employee Directors and Nominating & Governance Chair [Member]
Annual Payable, Additional Compensation		$ 10,000
Mr. Holdsworth [Member] \| Restricted Stock [Member]
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares)		5,785
Ms. Cefali [Member] \| Restricted Stock [Member]
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares)		4,871
Mr. Garland [Member] \| Restricted Stock [Member]
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares)		4,567
Mr. Fink [Member] \| Restricted Stock [Member]
Stock Issued During Period, Shares, Restricted Stock Award, Gross (in shares)		3,044