Quarterly report pursuant to Section 13 or 15(d)

Equity-Based Compensation (Detail)

v3.20.1
Equity-Based Compensation (Detail) - Restricted Stock - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2020
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 $ 0.8  
Unrecognized compensation expense $ 2.4 $ 2.4  
Class A Common Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options granted (in shares)     292,534