Equity-Based Compensation (Detail) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended |
|---|---|---|
Dec. 31, 2020 |
Sep. 30, 2019 |
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| Vested on January 1, 2021 | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Vesting rate | 67.00% | |
| Vesting January 1, 2022 | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Vesting rate | 33.00% | |
| Restricted Stock | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Aggregate grant date fair value | $ 3.8 | |
| Compensation expense | $ 0.4 | |
| Class A Common Stock | Restricted Stock | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Options granted (in shares) | 292,534 | |
| Unrecognized compensation expense | $ 1.3 |
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- Definition Share-Based Compensation Arrangement by Share-Based Payment Award Aggregate Grant Date Fair Value No definition available.
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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Gross number of share options (or share units) granted during the period. No definition available.
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- Definition Percentage of vesting of award under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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