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Property and Equipment - Additional Information (Details) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Property Plant And Equipment [Line Items]    
Depreciation expense $ 121,417 $ 115,447
Tenant Improvement | Minimum    
Property Plant And Equipment [Line Items]    
Property and equipment, estimated useful Life 6 years  
Tenant Improvement | Maximum    
Property Plant And Equipment [Line Items]    
Property and equipment, estimated useful Life 10 years  
Property and Equipment, Other Types | Minimum    
Property Plant And Equipment [Line Items]    
Property and equipment, estimated useful Life 3 years  
Property and Equipment, Other Types | Maximum    
Property Plant And Equipment [Line Items]    
Property and equipment, estimated useful Life 5 years