Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
(Loss) income from continuing operations	$ (13,053)	$ 1,907	$ 7,158
Loss from discontinued operations, net of tax	(14,342)	(51,037)	(20,620)
Net loss	(27,395)	(49,130)	(13,462)
Other comprehensive income (loss):
Foreign currency translation adjustment	72	281	(735)
Comprehensive loss	$ (27,323)	$ (48,849)	$ (14,197)