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Employee Stock Purchase Plan (Tables)

12 Months Ended

Sep. 30, 2013

Text Block [Abstract]

Weighted Average Assumptions of Employee Stock Purchase Plan

The following are the weighted-average assumptions used for the fiscal years ended September 30,

		2011		2012		2013
Dividend yield		0.0%		0.0%		0.0%
Risk-free interest rate		0.2%		0.1%		0.1%
Volatility		48.9%		51.8%		54.8%
Expected life		Six months		Six months		Six months

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- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ 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 (f)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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