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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2017
Accounting Policies [Abstract]  
Schedule of property plant and equipment useful life
Computers and equipment 5 years
Website development 3 years
Furniture and fixtures 7 years
Leasehold improvements Shorter of estimated useful life or remaining lease term
Schedule of finite lived intangible assets useful life
Patents   20 years
Trade names, trademarks, product names, URLs   5-10 years
Internally developed software   5-6 years
Non-compete agreements   3 years
Subscriber/customer relationships   3-12 years
Lead pool   2 years