Equity-Based Compensation - Summary of Activity Related to Stock Options (Details ) - Stock options - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Shares
Outstanding at the beginning of the period (in shares)	126,383
Options exercised (in shares)	(46,581)
Outstanding and exercisable at the end of the period (in shares)	79,802	126,383
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 3.02
Options exercised (in dollars per share)	2.97
Outstanding and exercisable at the end of the period (in dollars per share)	$ 3.05	$ 3.02
Weighted-Average Remaining Contractual Term (Years)
Outstanding		3 years 6 months
Exercisable at the end of the period	2 years 5 months 20 days