Unaudited Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net loss	$ (4,925)	$ (6,354)	$ (23,917)	$ (19,067)
Other comprehensive income (loss):
Unrealized gains (losses) on derivative instruments	(543)	(589)	393	(542)
Total other comprehensive income (loss)	(543)	(589)	393	(542)
Comprehensive loss	$ (5,468)	$ (6,943)	$ (23,524)	$ (19,609)