Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Narrative (Details)

v3.19.3.a.u2
Revenue Recognition - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Revenue from Contract with Customer [Abstract]    
Deferred revenue, revenue recognized $ 18.0 $ 21.8
Cumulative catch-up adjustment to revenue from change in estimates (1.4) (1.5)
Deferred contract costs 1.3 3.1
Amortization of deferred contract costs $ 2.2 $ 1.3