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Stockholders' Equity - Equity-based compensation (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Nov. 07, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	$ 3.3	$ 0.2	$ 5.5	$ 5.4
Accelerated vesting cost				$ 4.9
Unrecognized compensation expense	19.2		$ 19.2
Recognition period			2 years 8 months 12 days
General and administrative expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	1.6		$ 3.3
Cost of Sales [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense	$ 1.7		$ 2.2
2019 Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for issuance					8.0
Stock are available for issuance	2.9		2.9