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Future Minimum Payments for Operating Lease (Detail)
Mar. 31, 2019
USD ($)
Annual minimum payments:  
2019 (April 1, 2019 to December 31, 2019) $ 347,295
2020 478,455
2021 497,594
2022 (through June 30, 2022) 253,675
Total minimum payments $ 1,577,019