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Schedule of Future Minimum Office And Vehicle Lease Payments (Detail) - office and vehicle - USD ($)
Sep. 30, 2019
Dec. 31, 2018
Commitments And Contingencies [Line Items]    
2019 (Remainder) $ 365,139  
2020 1,470,217  
2021 1,499,484  
2022 1,241,089  
2023 87,957  
Total $ 4,663,886  
2019   $ 1,595,421
2020   1,623,835
2021   1,653,101
2022   1,305,096
2023   87,957
Total   $ 6,265,410