Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Intangible assets, gross	$ 5,877	$ 5,877
Accumulated amortization	(5,251)	(4,568)
Total	626	1,309
Customer relationships
Business Acquisition [Line Items]
Intangible assets, gross	4,335	4,335
Accumulated amortization	$ (4,335)
Estimated Useful Life	5 years
Affiliate network
Business Acquisition [Line Items]
Intangible assets, gross	$ 994	994
Accumulated amortization	$ (528)
Estimated Useful Life	12 years
Trademarks
Business Acquisition [Line Items]
Intangible assets, gross	$ 548	$ 548
Accumulated amortization	$ (388)
Estimated Useful Life	8 years