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Stockholders' Equity - Additional Information (Detail) - USD ($)
9 Months Ended
Jan. 29, 2021
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Class Of Stock [Line Items]        
Recognized compensation expense of stock options   $ 0 $ 10,200  
Remaining unrecognized compensation cost   0    
Aggregate intrinsic value of outstanding common stock options   0   $ 0
Proceeds from warrants exercised   $ 9,544,623 $ 3,081,480  
Number of warrants, exercised   (2,326,112) (275,540)  
Stock Warrants [Member]        
Class Of Stock [Line Items]        
Proceeds from warrants exercised   $ 9,500,000    
Number of warrants, exercised   2,300,000    
Number of cashless warrant exercise 129,800      
Warrants, aggregate intrinsic value outstanding   $ 21,200   $ 256,400