Loss Per Share - Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share, Basic [Abstract]
Numerator for basic loss per share	$ (6,756)	$ (2,257)	$ (15,281)	$ (16,266)
Denominator for basic loss per share, shares	40,889,732	40,856,815	40,875,704	40,720,958
Basic net loss (usd per share)	$ (0.17)	$ (0.06)	$ (0.37)	$ (0.40)
Earnings Per Share, Diluted [Abstract]
Numerator for diluted loss per share	$ (6,756)	$ (2,257)	$ (15,281)	$ (16,266)
Fair value of in the money warrants outstanding	0	1,284	0	1,284
Net loss attributable to common share	$ (6,756)	$ (3,541)	$ (15,281)	$ (17,550)
Denominator for basic loss per share, shares	40,889,732	40,856,815	40,875,704	40,720,958
Incremental shares underlying in the money warrants outstanding, shares	0	394,071	0	197,035
Denominator for diluted loss per share, shares	40,889,732	41,250,886	40,875,704	40,917,993
Diluted net loss (usd per share)	$ (0.17)	$ (0.09)	$ (0.37)	$ (0.43)