Stockholders' Equity - Narrative (Details) - USD ($) $ in Thousands			9 Months Ended
	Jun. 30, 2015	Jan. 01, 2015	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding (in shares)			20,142,715		16,878,817
Intrinsic value of stock options exercised			$ 4,900	$ 188
2014 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in authorized shares		675,152
2008 and 2014 Equity Incentive Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized (in shares)			2,084,913
Employee Stock [Member] | 2014 Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in authorized shares		168,788
Common stock purchased under ESPP (in shares)	2,699
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock based compensation expense			$ 13,900
Weighted average recognition period for stock-based compensation expense			2 years 11 months 26 days