Equity - Summary of Unvested Stock Options (Details) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Number of Shares
Unvested, beginning of period (in shares)	3,067,935
Granted (in shares)	0
Cancelled (in shares)	(154,200)
Vested (in shares)	(2,041,582)
Unvested, end of period (in shares)	872,153	3,067,935
Weighted- Average Grant Date Fair Value
Unvested, beginning of period (in dollars per share)	$ 3.81
Granted (in dollars per share)	0.00	$ 5.15	$ 4.18
Cancelled (in dollars per share)	6.77
Vested (in dollars per share)	3.61
Unvested, end of period (in dollars per share)	$ 4.28	$ 3.81