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Amount payable annually for services rendered.

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It represents the total annual compensation granted to non employee director.

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Share based goods and nonemployee services transaction value of stock option issued.

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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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Description of service or performance condition required to be met for earning right to award under share-based payment arrangement. Includes, but is not limited to, combination of market, performance or service condition.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

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

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No definition available.

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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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- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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- Definition

The number of shares or units of entity securities issued in the transaction in which equity securities were issued to pay for goods or nonemployee services.

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Price of a single share of a number of saleable stocks of a company.

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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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Stock options - Additional Information (Detail) - USD ($)									3 Months Ended	12 Months Ended
	Jun. 07, 2019	Mar. 08, 2019	Dec. 03, 2018	Dec. 13, 2017	Dec. 13, 2017	Sep. 08, 2017	Sep. 04, 2015	Sep. 05, 2014	Jan. 31, 2019	Oct. 31, 2019	Oct. 31, 2018	Nov. 01, 2018	Mar. 09, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average remaining life of options outstanding										4 years 1 month 28 days
Weighted average remaining contractual life of options exercisable										2 years 7 months 13 days
Weighted average life of options vested and expected to vest										4 years 1 month 24 days
Aggregate intrinsic value of options outstanding										$ 2,340,000
Aggregate intrinsic value of options exercisable										1,735,000
Aggregate intrinsic value of options vested and expected to vest										2,330,000
Non-vested stock-based arrangements yet to be recognized										$ 439,000
Stock based arrangements yet to be recognized, weighted average period expected to be recognized										5 years 3 months
Share-based compensation arrangement by share-based payment award, options, grants in period, gross									7,203
Non-employee director annual grant										$ 50,000
Fair value of stock option per share										$ 3.471
Stock based compensation expense										$ 317,000	$ 211,000
Share Based Goods And Non Employee Services Transaction Value Of Stock Option Issued										$ 25,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized													1,000,000
Nonqualified Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of stock option per share	$ 3.245
Share Based Goods And Non Employee Services Transaction Value Of Stock Option Issued	$ 10,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period										5 years
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 7.50								$ 8.07
Share-based Goods and Nonemployee Services Transaction, Quantity of Securities Issued	3,082
Nonqualified Plan [Member] \| Board of Directors Chairman [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amount Payable Annually for Services Rendered												$ 15,000
Incentive stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, options, grants in period, gross					80,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares				8,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights				8,000
Incentive stock options \| One Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, options, grants in period, gross		25,000	10,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares		5,000	2,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		10 years	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights		5,000	2,000
Incentive stock options \| Two Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, options, grants in period, gross			25,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares			5,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period			10 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights			5,000
Incentive stock options \| Nonqualified Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period				10 years
2010 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant										1,405,741
Incentive and Non-Qualified Stock Option Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additiona shares of common stock issued						1,000,000	500,000	500,000