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Operating Lease - Summary of Total Lease and Operating Expenses (Detail) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Leases [Abstract]        
Lease and operating expenses $ 241,200 $ 241,050 $ 691,432 $ 706,538