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Loans Payable - Note 10 - Payroll Protection Program - Additional Information (Detail) - USD ($) |  | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Apr. 16, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Jul. 01, 2021 | Dec. 31, 2020 | Oct. 01, 2016
Debt instrument face amount |  |  |  |  |  |  |  | $ 3,000,000.0
Percent of loan that will forgiven |  |  |  |  |  | 100.00% |  |
Interest Expense |  | $ 2,866,959 | $ 1,858,456 | $ 7,876,688 | $ 4,755,771 |  |  |
Cares Act Loan [Member] |  |  |  |  |  |  |  |
Debt instrument face amount | $ 370,400 | 0 |  | 0 |  |  | $ 370,400 |
Debt instrument maturity period | 2 years |  |  |  |  |  |  |
Debt instrument maturity date | Apr. 16, 2022 |  |  |  |  |  |  |
Debt instrument interest rate | 0.98% |  |  |  |  |  |  |
Interest Expense |  | $ 0 | $ 936 | $ 1,788 | $ 1,708 |  |  |

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