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v3.21.2

Debt - Additional Information (Details) - USD ($) |  | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Aug. 06, 2021 | Aug. 06, 2021 | Sep. 30, 2021 | Sep. 30, 2021
Debt Instrument [Line Items] |  |  |  |
Line of credit facility, interest rate |  | 4.50% |  |
Proceeds from Issuance of Warrants |  |  | $ 788,000 | $ 788,000
Interest expense amortized date |  |  |  | Mar. 01, 2023
Interest expense |  |  | 400,000 |
Term Loan [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum borrowing capacity under the credit facility | $ 25,000,000.0 | $ 25,000,000.0 |  |
Initial borrowing | 25,000,000.0 | $ 25,000,000.0 |  |
Description of payment terms |  |  |  | Agreement with principal repayments for the Term Loan Agreement starting on September 1, 2023 and a maturity date of August 1, 2025.
Interest rate |  |  |  | 7.75%
Percentage of final payment due |  | 5.75% |  |
Line of credit facility, interest rate |  | 7.75% |  |
Silicon Valley Bank Loan [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt remaining borrowing capacity | 25,000,000.0 | $ 25,000,000.0 |  |
Debt Instrument, maturity date |  |  |  | Aug. 01, 2025
Debt instrument description of variable rate basis |  |  |  | Outstanding loans bear interest, payable monthly, at the greater of (a) 7.75% and (b) the current published U.S. prime rate, plus a margin of 4.5%. As of September 30,
Debt instrument, periodic payment | $ 5,000,000 |  |  |
Cash and cash equivalents portion to be pledged | 50.00% |  |  |
Additional rate of interest on default | 3.00% |  |  |
Number of warrants issued | 432,844 | 432,844 |  |
Warrant exercise per share | $ 2.22 | $ 2.22 |  |
Proceeds from Issuance of Warrants | $ 800,000 |  |  |
Additional number warrants issued | 432,842 | 432,842 |  |
Silicon Valley Bank Loan [Member] | Term A Tranche [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Description of payment terms |  |  |  | the Term A Tranche will start on April 1, 2022, with a maturity date of March 1, 2023; however, if an Equity Milestone is achieved on or before March 31, 2022, principal repayments for the Term A Tranche will start on September 1, 2022, with a maturity date of August 1, 2025.
Silicon Valley Bank Loan [Member] | Term B Tranche [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt remaining borrowing capacity | $ 25,000,000.0 | $ 25,000,000.0 |  |
Silicon Valley Bank Loan [Member] | Term Loan [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum borrowing capacity under the credit facility | 50,000,000.0 | 50,000,000.0 |  |
Silicon Valley Bank Loan [Member] | Term Loan [Member] | Term A Tranche [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Initial borrowing | $ 25,000,000.0 | $ 25,000,000.0 |  |
Silicon Valley Bank Loan [Member] | Warrants |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Issuance costs |  |  | $ 1,000,000.0 | $ 1,000,000.0

X
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