Deferred Revenue - Performance Obligations (Details) $ in Millions	Mar. 31, 2022 USD ($)
Performance obligations
Remaining performance obligations	$ 23.6
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Performance obligations
Remaining performance obligations	$ 4.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Performance obligations
Remaining performance obligations	$ 9.8
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Performance obligations
Remaining performance obligations	$ 7.9
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Performance obligations
Remaining performance obligations	$ 1.8
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period