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Employee Stock Purchase Plan (Tables)

9 Months Ended

Jun. 30, 2017

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Weighted Average Assumptions of Employee Stock Purchase Plan

The following are the weighted average assumptions used for each respective period:

	Three Months Ended								Nine Months Ended
	June 30,								June 30,
	2016				2017				2016				2017
Dividend yield		0.0%				0.0%				0.0%				0.0%
Risk-free interest rate		0.4%				0.9%				0.2%				0.7%
Volatility		56.0%				46.1%				51.4%				40.7%
Expected life	Six months				Six months				Six months				Six months

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- References

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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=96867065&loc=d3e5070-113901

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