v2.4.0.6

Stockholders' Equity (Shares Reserved for Issuance) (Detail)	Sep. 30, 2012
Schedule Of Stock Options [Line Items]
Common stock reserved for future issuance	3,391,343
Stock Under Plans [Member]
Schedule Of Stock Options [Line Items]
Common stock reserved for future issuance	2,837,496
Stock Options And Restricted Stock Units [Member]
Schedule Of Stock Options [Line Items]
Common stock reserved for future issuance	553,847

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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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