Equity-Based Compensation - Stock Options (Details) - Stock options - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Number of Units
Outstanding, beginning (in shares)	1,627,947
Granted (in shares)	1,034,825
Exercised (in shares)	(129,431)
Cancelled (in shares)	(131,959)
Outstanding, end (in shares)	2,401,382	1,627,947
Options exercisable, end (in shares)	787,537
Weighted Average Exercise Price
Outstanding, beginning (in dollars per share)	$ 10.86
Granted (in dollars per share)	15.07
Exercised (in dollars per share)	7.06
Cancelled (in dollars per share)	15.46
Outstanding, end (in dollars per share)	12.63	$ 10.86
Options exercisable, end (in dollars per share)	$ 11.17
Stock options
Weighted average remaining contractual term	8 years 4 months 10 days	9 years 3 months 4 days
Weighted average remaining contractual term, exercisable	7 years 4 months 24 days
Aggregate intrinsic value, beginning	$ 19,831
Aggregate intrinsic value, end	6,523	$ 19,831
Aggregate intrinsic value, exercisable	$ 2,902
Weighted average grant date fair value (in dollars per share)	$ 10.53