Equity Incentive Plans - Summary of Activity Related to Outstanding Stock Options (Parenthetical) (Details) - Performance-Vested Stock Options	6 Months Ended
	Jun. 30, 2016 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Options, Granted | shares	117,759	[1]
Weighted Average Exercise Price, Granted | $ / shares	$ 9.05

[1] As of June 30, 2016, 117,759 performance-vested stock options at a weighted average exercise price of $9.05 have performance metrics that are probable of achievement. These shares are included in share-based compensation costs for the three and six months ended June 30, 2016.