Earnings (Loss) Per Share - Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Class of Stock [Line Items]
Loss from continuing operations	$ (3,421)	$ (1,870)	$ (5,285)	$ (2,011)
Income (loss) from discontinued operations, net of tax	319	(876)	(13,621)	(33,200)
Net loss	$ (3,102)	$ (2,746)	$ (18,906)	$ (35,211)
Weighted average common shares outstanding - Basic (in shares)	57,602	56,899	57,709	55,523
Assumed conversions:
Weighted average common shares outstanding - Diluted (in shares)	57,602	56,899	57,709	55,523
Basic earnings (loss) per common share:
Continuing operations (in dollars per share)	$ (0.06)	$ (0.03)	$ (0.09)	$ (0.04)
Discontinued operations, net of tax (in dollars per share)	0.01	(0.02)	(0.24)	(0.60)
Basic earnings (loss) per common share (in dollars per share)	(0.05)	(0.05)	(0.33)	(0.64)
Diluted earnings (loss) per common share:
Continuing operations (in dollars per share)	(0.06)	(0.03)	(0.09)	(0.04)
Discontinued operations, net of tax (in dollars per share)	0.01	(0.02)	(0.24)	(0.60)
Diluted earnings (loss) per common share (in dollars per share)	$ (0.05)	$ (0.05)	$ (0.33)	$ (0.64)
Stock Options
Assumed conversions:
Incremental common shares from stock options and restricted stock units (in shares)	0	0	0	0
Restricted Stock Units
Assumed conversions:
Incremental common shares from stock options and restricted stock units (in shares)	0	0	0	0