Equity-Based Compensation (Detail) - Restricted Stock - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended |
|---|---|---|
Dec. 31, 2019 |
Sep. 30, 2019 |
|
| 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 | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Options granted (in shares) | 292,534 | |
| Unrecognized compensation expense | $ 2.8 |
| X | ||||||||||
- Definition Share-Based Compensation Arrangement by Share-Based Payment Award Aggregate Grant Date Fair Value No definition available.
|
| X | ||||||||||
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- 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.
|
| X | ||||||||||
- Definition Gross number of share options (or share units) granted during the period. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|