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Stock Based Compensation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Stock Based Compensation
Shares reserved for future issuance	0		0
Stock Options Granted (in shares)			482
Vesting percentage on each anniversary of the grant date			25.00%
Maximum term for stock options			6 years 3 months	6 years 3 months
Stock based compensation expense	$ 1.3	$ 1.3	$ 3.5	$ 2.6
Grant date fair value of stock options granted			$ 6.70
Unrecognized compensation cost related to unvested stock options	$ 11.9		$ 11.9
Unrecognized compensation cost related to unvested options, recognized weighted-average period			2 years 6 months
Class A common stock
Stock Based Compensation
Number of shares reserved	800		800
Class A common stock \| Omnibus Plan
Stock Based Compensation
Shares reserved for future issuance	3,914		3,914
Share available for issuance	1,294		1,294
Maximum
Stock Based Compensation
Maximum term for stock options			10 years