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- Definition

Number of share options reserved for future distribution to employees.

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No definition available.

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The percentage represents the proportion of cash payment for share based compensation instead of stock issuance.

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No definition available.

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- Definition

Stock issued during period shares stock options exercised net of shares for tax withholdings.

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No definition available.

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- Definition

The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 710
-SubTopic 10
-Section 30
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363

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Unrecognized cost of unvested share-based compensation awards.

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- Definition

General descriptive information regarding an arrangement under which employees and directors receive: (a) awards of equity shares, equity share options, or other equity instruments; or (b) the entity incurs liabilities to them: (1) in amounts based, at least in part, on the price of the entity's shares or other equity instruments; or (2) that require or may require settlement by issuance of the entity's shares. Such an arrangement is usually provided to employees and directors to compensate them, provide performance incentives to them, and to attract or retain their services. May also include pertinent information particular to a plan that is not elsewhere specified in the taxonomy.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Paragraph 2
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- Definition

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).

+ References

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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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.

+ References

No definition available.

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- Definition

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

The number of shares purchased on the open market during the period for issuance to employees under the plan.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition

Percentage of vesting of share-based compensation awards.

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- Definition

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

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 210
-SubTopic 10
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SHARE-BASED COMPENSATION EXPENSE- Additional Information (Detail) - USD ($) shares in Thousands, $ in Thousands	1 Months Ended					3 Months Ended
	Jan. 31, 2018	Dec. 31, 2017	Jan. 31, 2017	Jan. 31, 2016	May 31, 2014	Mar. 31, 2018	Nov. 30, 2017	Mar. 31, 2017
Employee Benefit Plans Disclosure [Line Items]
Aggregate intrinsic value of the option awards vested						$ 0		$ 0
Unrecognized compensation cost on unvested option awards outstanding						$ 67
Director [Member]
Employee Benefit Plans Disclosure [Line Items]
Deferred Compensation Arrangement with Individual, Recorded Liability		$ 41
Share Based Compensation Non Employee Services Transaction cash Settlement Percentage						40.00%
2005 Restricted Stock Unit Award Plan [Member] \| Director [Member]
Employee Benefit Plans Disclosure [Line Items]
Deferred Compensation Arrangement with Individual, Recorded Liability						$ 13
Restricted Stock Award Plan [Member]
Employee Benefit Plans Disclosure [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant						1,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross			60
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	25.00%	100.00%	25.00%
Stock Issued During Period Shares Stock Options Exercised Net Of Shares For Tax Withholdings	262
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized							1,500
Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Grants In Period	67	200
Restricted Stock Award Plan [Member] \| Settled In Cash [Member]
Employee Benefit Plans Disclosure [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			18
Stock Issued During Period Shares Stock Options Exercised Net Of Shares For Tax Withholdings	24
Restricted Stock Award Plan [Member] \| Distributed In Common Stock [Member]
Employee Benefit Plans Disclosure [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			67
Restricted Stock Award Plan [Member] \| January 4, 2016 Award Distributed [Member]
Employee Benefit Plans Disclosure [Line Items]
Share Based Compensation Arrangement Share Based Payment Shares Reserved For Future Distribution			66		1
Restricted Stock Award Plan [Member] \| Convertible Common Stock [Member]
Employee Benefit Plans Disclosure [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			49
Stock Issued During Period Shares Stock Options Exercised Net Of Shares For Tax Withholdings	238
Restricted Stock Award Plan [Member] \| Four Non Employee Directors [Member]
Employee Benefit Plans Disclosure [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross			22
Deferred Compensation Arrangement with Individual, Recorded Liability						$ 41
2014 Restricted Stock Unit Award Plan [Member]
Employee Benefit Plans Disclosure [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant					400
Share-based Compensation Arrangement by Share-based Payment Award, Description			stock, for up to 40%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period				1
Share-based Compensation Arrangement by Share-based Payment Award, Shares Purchased for Award						3
Deferred Compensation Arrangement with Individual, Recorded Liability						$ 13
Restricted Stock Unit Award Plan [Member]
Employee Benefit Plans Disclosure [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Description	stock, for up to 40%