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Financial Instruments - Investments in Debt and Marketable Equity Securities Disclosure (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Jun. 30, 2022
Dec. 31, 2021
Cost or Amortized Cost        
Cash and cash equivalents, at carrying value $ 118,776 $ 232,200 $ 356,510 $ 571,384
Restricted cash 2,377 2,406 5,771 5,244
Cash, cash equivalents, and restricted cash:        
Cash, cash equivalents, and restrict cash balance 121,264 242,246 $ 408,201 $ 718,281
Fair Value, Measurements, Recurring        
Cost or Amortized Cost        
Restricted cash 2,377 2,406    
Cash, cash equivalents, and available-for-sale debt securities, amortized cost 227,592 394,715    
Unrealized Gains (Losses)        
Unrealized Gains 12 28    
Unrealized Losses (335) (758)    
Estimated Fair Value        
Cash equivalents 86,774 186,410    
Cash, cash equivalents, and available-for-sale debt securities 227,269 393,985    
Cash, cash equivalents, and restricted cash:        
Cash, cash equivalents, and restrict cash balance 121,153 234,606    
Long-term Investments        
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Noncurrent 5,473 29,480    
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Current 100,643 122,259    
U.S. treasury securities | Fair Value, Measurements, Recurring        
Cost or Amortized Cost        
Debt securities, available for sale, estimated fair value 56,641 126,405    
Unrealized Gains (Losses)        
Unrealized Gains 10 28    
Unrealized Losses (202) (753)    
Estimated Fair Value        
Debt securities, available-for-sale, amortized cost 56,833 127,130    
Long-term Investments        
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Noncurrent 5,473 29,480    
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Current 51,168 96,925    
Agency bonds | Fair Value, Measurements, Recurring        
Cost or Amortized Cost        
Debt securities, available for sale, estimated fair value 49,475 25,334    
Unrealized Gains (Losses)        
Unrealized Gains 2 0    
Unrealized Losses (133) (5)    
Estimated Fair Value        
Debt securities, available-for-sale, amortized cost 49,606 25,339    
Long-term Investments        
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Noncurrent 0 0    
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Current 49,475 25,334    
Cash | Fair Value, Measurements, Recurring        
Cost or Amortized Cost        
Cash and cash equivalents, at carrying value 32,002 53,430    
Estimated Fair Value        
Cash equivalents 32,002 53,430    
Cash, cash equivalents, and restricted cash:        
Cash, cash equivalents, and restrict cash balance 32,002 45,790    
Money markets funds | Fair Value, Measurements, Recurring        
Cost or Amortized Cost        
Cash and cash equivalents, at carrying value 86,774 186,410    
Estimated Fair Value        
Cash equivalents 86,774 186,410    
Cash, cash equivalents, and restricted cash:        
Cash, cash equivalents, and restrict cash balance $ 86,774 $ 186,410