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Summary of Significant Accounting Policies - Reconciliation of Numerators and Denominators used in Computing Basic and Diluted Net Income Per Share (Detail) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Accounting Policies [Abstract]        
Net income (loss) $ (4,229,833) $ (1,309,275) $ (8,172,000) $ (3,695,592)
Numerator, basic and diluted net income (loss) available to stockholders $ (4,229,833) $ (1,309,275) $ (8,172,000) $ (3,695,592)
Shares used in computation - basic:        
Weighted average common shares outstanding 9,456,300 8,466,909 9,301,796 8,466,909
Common shares outstanding for basic 9,456,300 8,466,909 9,301,796 8,466,909
Additional shares used in computation – diluted:        
Common shares outstanding for basic 9,456,300 8,466,909 9,301,796 8,466,909
Shares used in computing diluted net income per share 9,456,300 8,466,909 9,301,796 8,466,909
Net (loss) per share - basic $ (0.45) $ (0.15) $ (0.88) $ (0.44)
Net (loss) per share - diluted $ (0.45) $ (0.15) $ (0.88) $ (0.44)