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v3.22.1

Borrowings - Additional Information (Details) |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 01, 2020 USD ($) shares | Apr. 13, 2020 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 | Dec. 31, 2018 USD ($) | Jan. 01, 2019 USD ($) Installment | Oct. 26, 2017 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, outstanding balance |  |  | $ 214,000 | $ 362,000 |  |  |  |
Proceeds from PPP Loan |  | $ 2,300,000 |  | 2,289,000 |  |  |  |
PPP Loan, repayment date |  |  | Apr. 29, 2020 |  |  |  |  |
Subordinated Term Loan and Security Agreement | B. Riley Principal Investments, LLC |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maximum borrowings available |  |  |  |  |  |  |  | $ 12,000,000
Minimum principal amount outstanding of defined repayment penalties |  |  |  |  |  | $ 10,000,000 |  |
Prepayment penalty description |  |  |  |  |  | The prepayment penalty was 2% for 2019 and decreased to 1% after the second anniversary through maturity |  |
Interest rate, stated percentage |  |  |  |  |  | 10.00% |  |
Debt prepayment penalties percentage |  |  | 1.00% |  |  | 2.00% |  |
Line of credit facility, maturity date |  |  |  |  |  | Sep. 01, 2022 |  |
Note Amendment and Debt Cancellation Agreement | B. Riley Principal Investments, LLC |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Outstanding indebtedness | $ 4,000,000 |  |  |  |  |  |  |
Outstanding borrowings | $ 6,170,000 |  |  |  |  |  |  |
Debt instrument redemption date | Jun. 09, 2020 |  |  |  |  |  |  |
Conversion shares | shares | 822,682 |  |  |  |  |  |  |
Promissory Notes Payable |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, outstanding balance |  |  | $ 214,000 | $ 362,000 |  |  | $ 736,000 |
Debt instrument, periodic payment, number of equal quarterly installments | Installment |  |  |  |  |  |  | 20 |
Debt instrument, frequency of periodic payment |  |  |  |  | quarterly |  |  |
Promissory Notes Payable | Minimum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, payment term |  |  | 2 years |  |  |  |  |
Promissory Notes Payable | Maximum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  | 8.00% |  |  |  |  |
Debt instrument, payment term |  |  | 4 years |  |  |  |  |

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