Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment - Schedule of Property and Equipment (Detail)

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Property and Equipment - Schedule of Property and Equipment (Detail) - USD ($)
Sep. 30, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 627,932 $ 605,241
Less accumulated depreciation and amortization (423,018) (343,795)
Total 204,914 261,446
Furniture and fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 333,670 333,670
Computer equipment and office equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 142,045 119,354
Leasehold improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 152,217 $ 152,217