Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net loss	$ (9,548)	$ (6,637)	$ (90,896)
Change in fair value of derivatives, net of income tax (expense) benefit of $106, ($165) and $561, respectively	(278)	5,028	(5,697)
Comprehensive loss	$ (9,826)	$ (1,609)	$ (96,593)