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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