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Employee Stock Purchase Plan (Tables) | 9 Months Ended
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Jun. 30, 2023
Share-Based Payment Arrangement [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,
| 2022 |  | 2023 |  | 2022 |  | 2023
Dividend yield | 0.0% |  | 0.0% |  | 0.0% |  | 0.0%
Risk-free interest rate | 1.1% |  | 4.9% |  | 0.7% |  | 4.5%
Volatility | 49.0% |  | 46.4% |  | 49.0% |  | 47.0%
Expected life | Six Months |  | 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://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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