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Significant Accounting Policies - Property and Equipment (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Impairment of long-lived assets   $ 0.0 $ 0.0
Impairment, Long-Lived Asset, Held-for-Use, Statement of Income or Comprehensive Income [Extensible Enumeration] Asset Impairment Charges Asset Impairment Charges Asset Impairment Charges
Property and equipment impairments $ 0.3    
Minimum      
Useful life 3 years    
Maximum      
Useful life 5 years    
Internal-use software      
Useful life 3 years