Net Loss Per Share - Computation of basic and diluted net loss per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net loss:
Loss from continuing operations	$ (3,881)	$ (2,513)	$ (5,858)	$ (12,861)
Loss from discontinued operations	(397)	(2,237)	(712)	(28,071)
Net loss	$ (4,278)	$ (4,750)	$ (6,570)	$ (40,932)
Weighted average shares for basic and diluted net loss per share:
Weighted average shares for basic net loss per share	12,285	2,553	6,757	2,330
Effect of dilutive securities - weighted average of stock options, restricted stock awards, and warrants
Weighted average shares for basic and diluted net loss per share	12,285	2,553	6,757	2,330
Net loss per share - basic and diluted:
Loss from continuing operations (in dollars per share)	$ (0.32)	$ (0.98)	$ (0.87)	$ (5.52)
Loss from discontinued operations (in dollars per share)	(0.03)	(0.88)	(0.11)	(12.05)
Net loss per share - basic and diluted (in dollars per share)	$ (0.35)	$ (1.86)	$ (0.98)	$ (17.57)