Commitments and Contingencies (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	9 Months Ended
	Sep. 30, 2019	Mar. 31, 2021	Sep. 30, 2020	Sep. 30, 2019
Loss Contingencies
Intellectual property expenses incurred	$ 0.2		$ 0.4	$ 0.2
Forecast | Minimum
Loss Contingencies
Intellectual property expenses incurred		$ 0.3
Forecast | Maximum
Loss Contingencies
Intellectual property expenses incurred		$ 0.5