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Subsequent Event - Additional Information (Detail)
Oct. 04, 2021
USD ($)
$ / shares
shares
Sep. 30, 2021
USD ($)
$ / shares
Oct. 01, 2016
USD ($)
Subsequent Event [Line Items]      
Conversion price of Notes | $ / shares   $ 4.67  
Debt instrument face amount     $ 3,000,000.0
Termination And Settlement Agreement [Member]      
Subsequent Event [Line Items]      
Debt instrument face amount   $ 14,500,000  
Subsequent Event [Member] | Termination And Settlement Agreement [Member]      
Subsequent Event [Line Items]      
Debt Conversion, Converted Instrument, Amount $ 2,500,000    
Conversion price of Notes | $ / shares $ 6.60    
Debt conversion amount $ 6,500,000    
Debt conversion into equity $ 500,000    
Price Per share used for Ascertaining Number of shares to be issued | $ / shares $ 4.95    
Percentage of share volume-weighted average price per share used for Ascertaining Number of shares to be issued 90    
Debt instrument face amount $ 14,500,000    
Subsequent Event [Member] | Not later than December 1, 2021 [Member]      
Subsequent Event [Line Items]      
Debt instrument, number of shares | shares 984,848    
Debt Conversion, Converted Instrument, Amount $ 3,000,000.0