| Schedule of restricted marketable securities |
Restricted marketable securities consisted of the following as of June 30, 2025 and December 31, 2024 (in thousands): | | | | | | | | | | | | | | | | | June 30,
2025 | | December 31,
2024 | | U.S. debt | | $ | 112,855 | | | $ | 109,155 | | | Foreign government obligations | | 53,942 | | | 49,024 | | | Supranational debt | | 28,100 | | | 22,809 | | | U.S. government obligations | | 18,840 | | | 18,148 | | | Total restricted marketable securities | | $ | 213,737 | | | $ | 199,136 | |
|
| Schedule of restricted marketable securities, including unrealized gain or loss |
The following tables summarize the unrealized gains and losses related to our restricted marketable securities, by major security type, as of June 30, 2025 and December 31, 2024 (in thousands): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As of June 30, 2025 | | | Amortized
Cost | | Unrealized
Gains | | Unrealized
Losses | | Fair
Value | | U.S. debt | | $ | 143,727 | | | $ | — | | | $ | 30,872 | | | $ | 112,855 | | | Foreign government obligations | | 67,082 | | | — | | | 13,140 | | | 53,942 | | | Supranational debt | | 30,232 | | | — | | | 2,132 | | | 28,100 | | | U.S. government obligations | | 24,322 | | | — | | | 5,482 | | | 18,840 | | | Total | | $ | 265,363 | | | $ | — | | | $ | 51,626 | | | $ | 213,737 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As of December 31, 2024 | | | Amortized
Cost | | Unrealized
Gains | | Unrealized
Losses | | Fair
Value | | U.S. debt | | $ | 144,652 | | | $ | — | | | $ | 35,497 | | | $ | 109,155 | | | Foreign government obligations | | 62,595 | | | — | | | 13,571 | | | 49,024 | | | Supranational debt | | 25,351 | | | — | | | 2,542 | | | 22,809 | | | U.S. government obligations | | 24,368 | | | — | | | 6,220 | | | 18,148 | | | Total | | $ | 256,966 | | | $ | — | | | $ | 57,830 | | | $ | 199,136 | |
|