Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net income	$ 4,369	$ 8,043	$ 21,158
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments, net of tax of $0 for the years ended in December 31, 2017, 2016 and 2015	42	(176)	(165)
Interest rate swap, net of tax of $0 for the years ended in December 31, 2017, 2016 and 2015	1,327	531	(753)
Total other comprehensive income (loss), net of tax	1,369	355	(918)
Total comprehensive income	$ 5,738	$ 8,398	$ 20,240