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Commitments and Contingencies - Schedule of Minimum Future Lease Payments (Detail)
Sep. 30, 2019
USD ($)
Finance Lease Liabilities Payments Due [Abstract]  
For the remaining three months ending December 31, 2019 $ 112,769
December 31, 2020 423,331
December 31, 2021 412,099
December 31, 2022 400,100
December 31, 2023 363,529
December 31, 2024 and thereafter 2,898,146
Total $ 4,609,974