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Joint Venture (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Jun. 30, 2022
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
May 31, 2018
seat
Level 3 | Fair value, measurements, recurring | Noncontrolling Interest Liability          
Schedule of Equity Method Investments [Line Items]          
Settlement $ 177,800 $ 0 $ 0 $ 177,785  
Increase in fair value $ 99,800 $ 0 $ 0 $ 99,785  
Guardant Health AMEA, Inc          
Schedule of Equity Method Investments [Line Items]          
Equity method investment, ownership (as a percent)         50.00%
Number of seats on the board | seat         2