Stock-Based Compensation - Stock-based Compensation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation	$ 1,484	$ 1,066	$ 454
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
General and administrative	327	592	337
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
General and administrative	544	121	54
Performance Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
General and administrative	575	353	63
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
General and administrative	$ 38	$ 0	$ 0