Net Loss Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Numerator
Net loss attributable to common stockholders	$ (3,131)	$ (2,019)	$ (2,328)	$ (3,499)	$ (15,105)	$ (7,984)	$ (2,959)	$ (1,887)	$ (10,977)	$ (27,935)	$ (9,701)
Denominator
Weighted average shares outstanding - basic									25,288	9,041	4,615
Dilutive effect of preferred stock, restricted stock units, options, warrants and convertible debt									0	0	0
Weighted average shares outstanding - diluted									25,288	9,041	4,615