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Borrowings - Additional Information (Details) - USD ($) $ in Millions |  |  | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Aug. 24, 2021 | Jun. 25, 2021 | Sep. 30, 2021 | Dec. 31, 2020
Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Outstanding borrowings |  |  | $ 0.5 | $ 4.8
2019 Revolver [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maturity Date |  |  | Jun. 25, 2024 |
Unused borrowing capacity |  |  | $ 49.5 |
Revolving feature end date |  |  | Jun. 25, 2023 |
Interest rate |  |  | 4.75% |
2019 Revolver [Member] | LIBOR [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate description |  |  | LIBOR + 3.75% |
2019 Revolver [Member] | First Amendment to Loan and Security Agreement [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum principal amount |  | $ 50.0 |  |
Maturity Date |  | Jun. 25, 2024 |  |
2019 Revolver [Member] | First Amendment to Loan and Security Agreement [Member] | LIBOR [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest Rate |  | 3.75% |  |
2021 Revolver [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum principal amount | $ 160.0 |  |  |
Maturity Date | Aug. 24, 2026 |  |  |
Commitment fee percentage | 0.25% |  |  |
Outstanding letter of credit issued |  |  | $ 0.5 |
2021 Revolver [Member] | LIBOR [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate description | LIBOR (or a replacement rate established in accordance with the terms of the credit agreement) (subject to a 0.00% LIBOR floor), plus a margin of 2.75% per annum |  |  |
2021 Revolver [Member] | Base Rate [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate description | the Alternative Base Rate plus a margin of 1.75% per annum |  |  |
2021 Revolver [Member] | Alternative Base Rate Highest [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate description | (a) the Wall Street Journal prime rate, (b) the NYFRB rate plus 0.5%, and (c)(i) 1.00% plus (ii) the adjusted LIBOR rate for a one-month interest period. |  |  |
Letter Of Credit [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum principal amount | $ 20.0 |  |  |

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