Number of Plans With Share-Based Awards Outstanding

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- Definition

Share based compensation arrangement by share based payment award options vested in period.

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- Definition

Stock Based Compensation [Line Items]

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

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- Definition

Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

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

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

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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- Definition

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

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Stock Option Plans - Additional Information (Detail)	12 Months Ended
Stock Option Plans - Additional Information (Detail)	Jan. 31, 2019 USD ($) plan $ / shares shares	Jan. 31, 2018 USD ($) $ / shares shares	Jan. 31, 2017 USD ($) shares
Stock Based Compensation [Line Items]
Compensation expense related to stock-based awards granted	$ 781,000	$ 903,000	$ 737,000
Weighted average grant-date fair value of options granted \| $ / shares	$ 1.80	$ 2.02
Number of options granted \| shares	441,000		0
Excess tax benefit from share-based compensation	$ 0	$ 0	$ 0
Number of plans with share-based awards outstanding \| plan	5
Contractual term of stock options granted and outstanding			0 years
Number of options exercised \| shares	0	0	0
Fair value of options vested	$ 850,000	$ 500,000	$ 1,000,000
Options vested \| shares	421,000
Total unrecognized compensation expense related to unvested stock options	$ 700,000
Expense expected to be recognized over weighted average period	1 year 7 months 6 days
Restricted Stock
Stock Based Compensation [Line Items]
Total unrecognized compensation expense related to unvested restricted stock awards	$ 0
2006 Plan
Stock Based Compensation [Line Items]
Vesting period of stock options granted and outstanding	3 years
Contractual term of stock options granted and outstanding	10 years
Shares available for grant \| shares	197,000
1994 Plan
Stock Based Compensation [Line Items]
Vesting period of stock options granted and outstanding	3 years
Contractual term of stock options granted and outstanding	10 years
1998 Plan
Stock Based Compensation [Line Items]
Vesting period of stock options granted and outstanding	3 years
Contractual term of stock options granted and outstanding	10 years
2000 Plan
Stock Based Compensation [Line Items]
Vesting period of stock options granted and outstanding	3 years
Contractual term of stock options granted and outstanding	10 years
Director Plan
Stock Based Compensation [Line Items]
Vesting period of stock options granted and outstanding	1 year
Contractual term of stock options granted and outstanding	10 years