Basis of Presentation - CEO compensation (Details) - CEO - Liberty $ in Millions	1 Months Ended
	Dec. 31, 2019 USD ($)
CEO compensation allocation percentage	19.00%
Employment Agreement Term	5 years
Annual base salary	$ 3.0
One-time cash commitment bonus	5.0
Annual target cash performance bonus	17.0
Annual equity awards	17.5
Upfront awards	$ 90.0