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Notes Payable (PPP Loan) - Additional Information (Detail) - USD ($)
9 Months Ended
May 03, 2020
May 02, 2020
Sep. 30, 2021
Sep. 30, 2020
Disclosure Of Long Term Notes Payable [Line Items]        
Proceeds from notes payable     $ 0 $ 41,600
Citibank [Member] | Paycheck Protection Program Loan [Member]        
Disclosure Of Long Term Notes Payable [Line Items]        
Proceeds from notes payable $ 41,600      
Debt instrument maturity date   May 02, 2022    
Debt instrument stated interest rate   1.00%