Property and Equipment (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 15,427,336	$ 15,229,094
Less accumulated depreciation	(11,278,302)	(10,704,976)
Property and equipment - net	4,149,034	4,524,118
Servers, computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	14,204,981	14,044,505
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	554,585	521,233
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 667,770	$ 663,356