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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 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Accounting Policies [Abstract]        
Net income (loss) $ (4,098,623) $ (2,774,282) $ (6,996,598) $ (3,942,168)
Numerator, basic and diluted net income (loss) available to stockholders $ (4,098,623) $ (2,774,282) $ (6,996,598) $ (3,942,168)
Shares used in computation – basic:        
Weighted average common shares outstanding 9,542,449 9,224,318 9,530,056 9,223,264
Common shares outstanding for basic 9,542,449 9,224,318 9,530,056 9,223,264
Shares used in computation – diluted:        
Common shares outstanding for basic 9,542,449 9,224,318 9,530,056 9,223,264
Shares used in computing diluted net income per share 9,542,449 9,224,318 9,530,056 9,223,264
Net (loss) per share – basic $ (0.43) $ (0.30) $ (0.73) $ (0.43)
Net (loss) per share – diluted $ (0.43) $ (0.30) $ (0.73) $ (0.43)