Quarterly report pursuant to Section 13 or 15(d)

Debt and Other Financing Arrangements - Schedule of Debt (Parenthetical) (Detail)

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Debt and Other Financing Arrangements - Schedule of Debt (Parenthetical) (Detail) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Note payable matured on May 1, 2021 [Member]    
Debt Instrument [Line Items]    
Down payment for note payable   $ 20,746
Debt instrument, maturity date   May 01, 2021
Debt instrument, interest rate percentage   5.95%
Debt instrument, periodic payment   $ 19,251
Debt instrument due period   10 months
Unsecured financing agreement with commercial premium financing company maturing in June 1, 2022 [Member]    
Debt Instrument [Line Items]    
Down payment for note payable $ 36,255  
Debt instrument, maturity date Jun. 01, 2022  
Debt instrument, interest rate percentage 3.95%  
Debt instrument, periodic payment $ 19,115  
Debt instrument due period 11 months  
Promissory note issued by a financial institution maturing in April 30, 2022 [Member]    
Debt Instrument [Line Items]    
Down payment for note payable $ 0  
Debt instrument, maturity date Apr. 30, 2022  
Debt instrument, interest rate percentage 1.00%