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Property and Equipment, Net (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 6,330,112	$ 6,170,212	$ 5,893,718
Less: Accumulated depreciation	(5,753,638)	(5,547,500)	(5,100,413)
Total property and equipment, net	576,474	622,712	793,305
Computer equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	3,706,017	3,706,017	3,720,985
Website development [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	2,502,342	2,342,442	2,050,980
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	89,027	89,027	89,027
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 32,726	$ 32,726	$ 32,726

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- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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