Revenue - Remaining Performance Obligations (Details) $ in Millions	Dec. 31, 2019 USD ($)
Remaining Performance Obligations
Revenue, remaining performance obligation, amount	$ 15.8
Minimum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-04-01
Remaining Performance Obligations
Revenue, remaining performance obligation, expected timing of satisfaction, period	12 months
Maximum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-04-01
Remaining Performance Obligations
Revenue, remaining performance obligation, expected timing of satisfaction, period	24 months