v3.25.2
Available-for-sale debt securities (Tables)
 12 Months Ended
Dec. 31, 2024
Debt Securities, Available-for-Sale [Abstract]  
Summary of Details of Available-for-sale Debt Securities
The cost basis, fair values and gross unrealized gains and losses of available-for-sale debt securities, at fair value are as follows (in thousands):
Table 4.1. Details of Available-for-sale Debt Securities
 
 
  
December 31, 2024
 
  
December 31, 2023
 
 
  
Amortized
Cost
 
  
Unrealized
Gains
 
  
Unrealized
Losses
 
  
Fair
Value
 
  
Amortized
Cost
 
  
Unrealized
Gains
 
  
Unrealized
Losses
 
 
Fair Value
 
U.S. Treasury securities
  
$
— 
 
  
$
— 
 
  
$
— 
 
  
$
— 
 
  
$
111,379
 
  
$
40
 
  
$
(12
) 
 
$
111,407
 
U.S. agency bonds
  
$
— 
 
  
$
— 
 
  
$
— 
 
  
$
— 
 
  
 
128,520
 
  
 
199
 
  
 
(3
) 
 
 
128,716
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
 
 
 
 
Total
  
$
— 
 
  
$
— 
 
  
$
— 
 
  
$
— 
 
  
$
239,899
 
  
$
239
 
  
$
(15
) 
 
$
240,123
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
 
 
 
 
Summary of Maturities of Available-for sale Debt Securities
The following table presents certain information regarding contractual maturities of our available-for-sale debt securities, at fair value (in thousands):
Table 4.2. Maturities of Available-for sale Debt Securities
 
Maturity
  
December 31, 2024
 
  
December 31, 2023
 
 
  
Amortized
Cost
 
  
% of
Total
 
  
Fair
Value
 
  
% of
Total
 
  
Amortized
Cost
 
  
% of
Total
 
  
Fair Value
 
  
% of
Total
 
One year or less
  
$
— 
 
  
 
— %
  
 
$
— 
 
  
 
— %
 
 
$
152,108
 
  
 
63.0%
 
 
$
152,183
 
  
 
63.0%
 
After one year through five years
  
 
— 
 
  
 
— %
 
 
 
— 
 
  
 
— %
 
 
 
87,791
 
  
 
37.0%
 
 
 
87,940
 
  
 
37.0%
 
  
 
 
 
  
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
  
 
 
 
Total
  
$
— 
 
  
 
— %
 
 
$
— 
 
  
 
— %
 
 
$
239,899
 
  
 
100.0%
 
 
$
240,123
 
  
 
100.0%
  
  
 
 
 
  
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
  
 
 
 
Summary of Interest Income on Available-for-sale Debt Securities
Table 4.3. Interest Income on Available-for-sale Debt Securities
 
 
  
Year ended December 31,
 
 
  
2024
 
  
2023
 
  
2022
 
Interest income
  
$
8,452
 
  
$
5,771
 
  
$
482,684