v3.22.1

Long-term Notes and Convertible Notes - Paycheck Protection Program (Details) - Paycheck Protection Program - USD ($) | May 02, 2020 | May 01, 2020 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Debt instrument, face amount |  | $ 5,653,000 |  |
Interest rate (as a percent) |  | 1.00% |  |
Deferral period |  | 6 months |  |
Accrued interest payments |  |  | $ 4,000 | $ 37,000
Payments on PPP Loan | $ 0 |  |  |

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