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Supplemental Financial Statement Information - Narrative (Details) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Concentration Risk [Line Items]    
Restricted cash $ 3,090,000 $ 3,090,000
Allowance for credit loss 0 0
Depreciation 1,983,000 2,540,000
Impairment of property and equipment 500,000  
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
Impairment Of Intangible Asset, Indefinite Lived, Excluding Goodwill, Statement Of Income Or Comprehensive Income, Extensible Enumeration, Not Disclosed Flag impairment charges  
Impairment, Long-Lived Asset, Held-for-Use, Statement of Income or Comprehensive Income [Extensible Enumeration] Restructuring Costs and Asset Impairment Charges  
China    
Concentration Risk [Line Items]    
Deposits $ 5,000,000