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Operating Leases - Future minimum lease undiscounted payments under non-cancelable operating leases (Detail) - USD ($)
Dec. 31, 2019
Jan. 01, 2019
Leases [Abstract]    
2020 $ 79,716  
2021 75,656  
Total 155,372  
Less: Interest expense 8,149  
Operating lease liabilities $ 147,223 $ 217,000