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v3.21.2

Equity-Based Compensation - Fair Value of Underlying Common Stock and Exercise Price of Stock Options (Details) - $ / shares | Sep. 30, 2021 | Sep. 30, 2020
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Minimum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Fair value of underlying common stock (dollars per share) | $ 1.15 | $ 1.19
Exercise price of common stock option (dollars per share) | 1.15 | 1.19
Maximum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Fair value of underlying common stock (dollars per share) | 2.57 | 2.80
Exercise price of common stock option (dollars per share) | 2.57 | 2.80
Weighted Average |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Fair value of underlying common stock (dollars per share) | 1.87 | 1.91
Exercise price of common stock option (dollars per share) | $ 1.87 | $ 1.94

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- Definition Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award. + References No definition available. + Details
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- Definition Price of a single share of a number of saleable stocks of a company. + References No definition available. + Details
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