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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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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

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