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Supplemental Financial Statement Information - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Concentration Risk [Line Items] |  |  |
Restricted cash | $ 3,090,000 | $ 3,239,000 |
Allowance for credit loss | 0 | 0 | $ 0
Depreciation | 2,540,000 | 3,845,000 | 5,430,000
Tangible asset impairment charges |  | 2,200,000 |
Finite-lived intangible assets | 17,200,000 | 17,200,000 |
Accumulated amortization and impairment charges | 17,200,000 | 17,200,000 |
Indefinite-lived intangible assets (excluding goodwill) | 5,100,000 | 5,100,000 |
Impairment charges | 3,200,000 | 3,200,000 |
Amortization of acquired intangible assets | 0 | 0 | 536,000
Intangible asset impairment | 0 | $ 0 | $ 6,100,000
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  | Restructuring Costs and Asset Impairment Charges
China |  |  |
Concentration Risk [Line Items] |  |  |
Deposits | $ 3,200,000 |  |

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- Definition Finite-Lived Intangible Assets, Accumulated Amortization And Impairment Charges + References No definition available. + Details
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