The annual compensation package for nonemployee directors.

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The 20 day average price of a single share of a number of saleable stocks of a company.

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The number of equity instruments other than options granted during the period per each director under share based payment.

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No definition available.

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The amount 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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No definition available.

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The number of options to vest each year under share based payment arrangement.

+ References

No definition available.

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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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- Definition

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

+ References

No definition available.

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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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- Definition

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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Number of options vested.

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No definition available.

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Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP).

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Note 7 - Stock-based Compensation and Equity Transactions (Details Textual) - USD ($)						3 Months Ended		6 Months Ended
	Jan. 09, 2020	Dec. 06, 2019	Nov. 04, 2019	Mar. 08, 2019	Dec. 03, 2018	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term (Year)								5 years 193 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term (Year)								3 years 211 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term (Year)								5 years 189 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value						$ 1,224,000		$ 1,224,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value						719,000		719,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value						1,216,000		1,216,000
Selling, General and Administrative Expenses [Member]
Share-based Payment Arrangement, Expense						96,000	$ 78,000	283,000	$ 192,000
Share-based Payment Arrangement, Nonemployee [Member]
Nonemployee Director, Annual Compensation						50,000		$ 50,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Value			$ 25,000
Share Price, 20 Day Average (in dollars per share)			$ 6.36
Incentive Stock Options [Member]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)								$ 3.13	$ 4
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total						713,000		$ 713,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)								4 years 153 days
Restricted Stock [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total						$ 284,000		$ 284,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)								1 year 146 days
Restricted Stock [Member] \| Share-based Payment Arrangement, Nonemployee [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			3,270
Two Employees [Member] \| Incentive Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)	3,241				25,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares (in shares)					5,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Number to Vest Each Year (in shares)					5,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)					4 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)					10 years
One Employee [Member] \| Incentive Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)		50,000		25,000	10,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares (in shares)		10,000		5,000	2,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Number to Vest Each Year (in shares)		10,000		5,000	2,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)		4 years		4 years	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)		10 years		10 years	10 years
Three Employees [Member]
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total (in shares)	12,075
Share-based Payment Arrangement, Expense	$ 77,000
Five Employees [Member] \| Incentive Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)	77,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)	10 years
Five Employees [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	38,500
Five Employees [Member] \| Restricted Stock and Incentive Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	4 years
Five Employees [Member] \| Restricted Stock and Incentive Stock Options [Member] \| Vesting on January 9, 2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	25.00%