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Loans Payable - Note 11 - Emergency Injury Disaster Loan - Additional Information (Detail) - USD ($) |  | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 26, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020 | Oct. 01, 2016
Debt instrument face amount |  |  |  |  |  |  | $ 3,000,000.0
Emergency Injury Disaster Loan [Member] |  |  |  |  |  |  |
Debt instrument face amount | $ 149,900 | $ 149,900 |  | $ 149,900 |  | $ 149,900 |
Debt instrument interest rate | 3.75% |  |  |  |  |  |
Debt instrument periodic payment | $ 731 |  |  |  |  |  |
Debt instrument maturity period | 30 years |  |  |  |  |  |
Debt, interest expense |  | $ 6,449 | $ 0 | $ 6,449 | $ 0 |  |

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