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Operating Lease - Future Minimum Lease Payments under Operating Leases (Detail)
Jun. 30, 2020
USD ($)
Leases [Abstract]  
Remainder of 2019 $ 312,089
2020 624,179
2021 624,179
2022 624,179
2023 624,179
Thereafter 156,045
Total future lease payments due $ 2,964,850