Stock-Based Compensation - Schedule of Outstanding Restricted Stock Units (Details) - Restricted Stock Units (RSUs) - shares	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Non-vested Shares [Roll Forward]
Non-vested RSUs at beginning of period, Shares	728,909
Vested, Shares	(280,200)
Non-vested RSUs at end of period, Shares	448,709	728,909
Nn-vested RSUs, Weighted Average Remaining Contractual Term (in years)	1 year 10 months 25 days	2 years 2 months 12 days