Stock Options - Additional Information (Detail) - shares	Aug. 25, 2006	May. 01, 2006
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares approved for Purchase		1,200,000
Stock option granted price percentage	110.00%
Life of option granted	7 years
Options granted exercisable period		10 years
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares approved for Purchase	500,000
Stock option granted ownership percentage	10.00%
Vesting period	9 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares approved for Purchase	100,000

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

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.

+ 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).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Ownership Percentage

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award Options Granted Percentage Of Market Value

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- Definition

Share Based Compensation Arrangement By Share Payment Option Exercisable Maximum Period

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options, Initial Contractual Term

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