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Commitments and Contingencies - Additional Information (Details) - USD ($) | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Restricted Cash and Cash Equivalents Items [Line Items] |  |
Restricted funds |  | $ 21,028,000
Percent of tax savings to be paid | 85.00% |
Collateral with financial institutions |  |
Restricted Cash and Cash Equivalents Items [Line Items] |  |
Restricted funds | $ 11,662,000 | 4,743,000
Letter of Credit | Line of Credit |  |
Restricted Cash and Cash Equivalents Items [Line Items] |  |
Maximum borrowing capacity | 15,400,000 | 8,300,000
Letter of Credit | Line of Credit | Restricted Cash For Letters Of Credit |  |
Restricted Cash and Cash Equivalents Items [Line Items] |  |
Restricted funds | 15,400,000 | 8,300,000
Letter of Credit | Line of Credit | Collateral with financial institutions |  |
Restricted Cash and Cash Equivalents Items [Line Items] |  |
Restricted funds | $ 15,400,000 | $ 8,300,000

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