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Short-term Investments - Available-for-Sale Securities (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]    
Amortized cost $ 114,685 $ 242,140
Gross unrealized gains 0 5
Gross unrealized losses (1,301) (324)
Fair value 113,384 241,821
Corporate debt securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized cost 80,363 177,375
Gross unrealized gains 0 3
Gross unrealized losses (841) (195)
Fair value 79,522 177,183
Government-related debt securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized cost 31,039 33,134
Gross unrealized gains 0 2
Gross unrealized losses (423) (97)
Fair value 30,616 33,039
Asset-backed Securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized cost 3,283 31,631
Gross unrealized gains 0 0
Gross unrealized losses (37) (32)
Fair value $ 3,246 $ 31,599