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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, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Accounting Policies [Abstract]        
Net income (loss) $ 4,085,297 $ 5,448,046 $ 10,033,014 $ 12,444,644
Numerator, basic and diluted net income (loss) available to stockholders $ (4,085,297) $ (5,448,046) $ (10,033,014) $ (12,444,644)
Shares used in computation – basic:        
Weighted average common shares outstanding 13,273,241 10,616,080 12,971,591 9,894,707
Common shares outstanding for basic 13,273,241 10,616,080 12,971,591 9,894,707
Shares used in computation – diluted:        
Common shares outstanding for basic 13,273,241 10,616,080 12,971,591 9,894,707
Shares used in computing diluted net income per share 13,273,241 10,616,080 12,971,591 9,894,707
Net (loss) per share – basic $ (0.31) $ (0.51) $ (0.77) $ (1.26)
Net (loss) per share – diluted $ (0.31) $ (0.51) $ (0.77) $ (1.26)