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Commitments and Contingencies - Future Minimum Lease Payments Under Operating Leases (Detail)
Jun. 30, 2019
USD ($)
Leases [Abstract]  
2019 $ 932,495
2020 1,521,451
2021 2,256,379
2022 2,521,446
2023 2,590,558
2024 and thereafter 13,495,719
Total $ 23,318,048