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v3.21.2

Equity Transactions - Fair Value (Details) | 12 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2019
Stock options |  |  |
Fair value assumptions |  |  |
Dividend yield | 0.00% | 0.00% | 0.00%
Expected volatility, minimum | 51.00% | 46.50% | 47.80%
Expected volatility, maximum | 55.90% | 51.00% | 53.70%
Risk free interest rate, minimum | 0.40% | 0.50% | 1.90%
Risk free interest rate, maximum | 0.80% | 1.50% | 2.80%
Expected term |  | 7 years 4 months 24 days | 7 years 1 month 6 days
Stock options | Minimum |  |  |
Fair value assumptions |  |  |
Expected term | 4 years 7 months 6 days | 4 years 7 months 6 days |
Stock options | Maximum |  |  |
Fair value assumptions |  |  |
Expected term | 7 years 7 months 6 days |  |
Stock appreciation rights |  |  |
Fair value assumptions |  |  |
Dividend yield | 0.00% | 0.00% | 0.00%
Expected volatility, minimum | 78.30% | 55.00% | 38.20%
Expected volatility, maximum | 78.30% | 68.80% | 48.80%
Risk free interest rate, minimum | 0.10% | 0.10% | 1.30%
Risk free interest rate, maximum | 0.10% | 0.10% | 1.70%
Stock appreciation rights | Minimum |  |  |
Fair value assumptions |  |  |
Expected term | 1 year 3 months 18 days | 0 years | 1 month 6 days
Stock appreciation rights | Maximum |  |  |
Fair value assumptions |  |  |
Expected term | 1 year 3 months 18 days | 2 years 3 months 18 days | 3 years 3 months 18 days
Stock options, RSUs and SARS, market based |  |  |
Fair value assumptions |  |  |
Dividend yield | 0.00% | 0.00% | 0.00%
Expected volatility, minimum | 51.60% | 45.20% | 45.50%
Expected volatility, maximum | 54.60% | 54.90% | 55.00%
Risk free interest rate, minimum | 0.30% | 0.10% | 1.50%
Risk free interest rate, maximum | 0.90% | 1.70% | 2.90%
Stock options, RSUs and SARS, market based | Minimum |  |  |
Fair value assumptions |  |  |
Expected holding period | 31.70% | 30.70% | 25.90%
Stock options, RSUs and SARS, market based | Maximum |  |  |
Fair value assumptions |  |  |
Expected holding period | 100.00% | 100.00% | 100.00%

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- Definition Share-Based Compensation Arrangement By Share-Based Payment Award, Fair Value Assumptions, Expected Holding Period + References No definition available. + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the maximum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References No definition available. + Details
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- Definition The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References No definition available. + Details
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- Definition The maximum risk-free interest rate assumption that is used in valuing an option on its own shares. + References No definition available. + Details
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- Definition The minimum risk-free interest rate assumption that is used in valuing an option on its own shares. + References No definition available. + Details
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- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + 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)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.D.2) -URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809 + Details
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