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Description of Business and Summary of Significant Accounting Policies - Investments (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Net Investment Income [Line Items] |  |
Debt securities, fair value disclosure | $ 91,641 | $ 67,575
Asset pledged as collateral |  |
Net Investment Income [Line Items] |  |
Debt securities, fair value disclosure | 2,679 | 3,440
Asset pledged as collateral | US Treasury Notes |  |
Net Investment Income [Line Items] |  |
Debt securities, fair value disclosure | 1,216 | 1,276
Investments, short-term | 500 |
Investments, long-term | 800 | 1,300
Asset pledged as collateral | Certificates of deposit |  |
Net Investment Income [Line Items] |  |
Debt securities, fair value disclosure | 1,463 | 2,164
Investments, short-term | 200 | 1,300
Investments, long-term | $ 1,200 | $ 900

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