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Employee Stock Purchase Plan (Tables)

12 Months Ended

Sep. 30, 2021

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 the fiscal years ended September 30,

		2019			2020			2021
Dividend yield		0.0%			0.0%			0.0%
Risk-free interest rate		2.4%			0.8%			0.1%
Volatility		48.3%			69.7%			69.6%
Expected life		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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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