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Operating Lease - Summary of Total Lease and Operating Expenses (Detail) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Leases [Abstract]        
Lease and operating expenses $ 239,838   $ 731,366  
Lease and operating expenses   $ 238,014   $ 732,318