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Summary of Significant Accounting Policies - Additional Information (Details)
3 Months Ended
Mar. 31, 2018
USD ($)
Segment
shares
Mar. 31, 2017
shares
Schedule Of Significant Accounting Policies [Line Items]    
Number of operating segment | Segment 1  
Number of Reportable Segments | Segment 1  
ASU 2014-09    
Schedule Of Significant Accounting Policies [Line Items]    
Revenue or contract with customer | $ $ 0  
Options    
Schedule Of Significant Accounting Policies [Line Items]    
Anti-dilutive securities excluded from calculation of diluted loss per share | shares 2,208,646 1,957,000
Warrants    
Schedule Of Significant Accounting Policies [Line Items]    
Anti-dilutive securities excluded from calculation of diluted loss per share | shares 1,818,439 2,017,152
Minimum    
Schedule Of Significant Accounting Policies [Line Items]    
Effective income tax rate 50.00%  
Leasehold Improvements    
Schedule Of Significant Accounting Policies [Line Items]    
Estimated useful life 5 years  
Software and Hardware | Minimum    
Schedule Of Significant Accounting Policies [Line Items]    
Estimated useful life 3 years  
Software and Hardware | Maximum    
Schedule Of Significant Accounting Policies [Line Items]    
Estimated useful life 5 years