Stockholders' Equity - Summary of Restricted Stock Unit Activity (Details) - Restricted Stock Units (RSUs) [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Number of Shares (in thousands)
Beginning Balance outstanding	1,202	0
Awarded	571	1,257
Released	(394)	0
Forfeited	(191)	(55)
Ending Balance of Non-vested and outstanding at December 31, 2016	1,188	1,202
Expected to vest	903
Weighted Average Grant Date Fair Value
Beginning Balance outstanding (in dollars per share)	$ 10.31	$ 0.00
Awarded (in dollars per share)	6.32	10.31
Released (in dollars per share)	10.31
Forfeited (in dollars per share)	10.01	10.31
Ending Balance of Non-vested and outstanding (in dollars per share)	8.44	$ 10.31
Expected to vest at December 31, 2015 (in dollars per share)	$ 8.76
Aggregate Fair Value
Beginning Balance of Non-vested and outstanding at December 31, 2016	$ 6,220	$ 0
Forfeited		8,110
Ending Balance of Non-vested and outstanding at December 31, 2016	8,968	$ 6,220
Expected to vest	$ 6,817
Vesting period (in years)	4 years