| Schedule of restricted marketable securities |
Restricted marketable securities consisted of the following as of June 30, 2026 and December 31, 2025 (in thousands): | | | | | | | | | | | | | | | | | June 30,
2026 | | December 31,
2025 | | U.S. debt | | $ | 114,005 | | | $ | 115,350 | | | Foreign government obligations | | 53,321 | | | 54,156 | | | Supranational debt | | 28,112 | | | 28,276 | | | U.S. government obligations | | 18,877 | | | 19,390 | | | Total restricted marketable securities | | $ | 214,315 | | | $ | 217,172 | |
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| 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, 2026 and December 31, 2025 (in thousands): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As of June 30, 2026 | | | Amortized
Cost | | Unrealized
Gains | | Unrealized
Losses | | Fair
Value | | U.S. debt | | $ | 141,850 | | | $ | — | | | $ | 27,845 | | | $ | 114,005 | | | Foreign government obligations | | 65,549 | | | — | | | 12,228 | | | 53,321 | | | Supranational debt | | 30,013 | | | 70 | | | 1,971 | | | 28,112 | | | U.S. government obligations | | 24,226 | | | — | | | 5,349 | | | 18,877 | | | Total | | $ | 261,638 | | | $ | 70 | | | $ | 47,393 | | | $ | 214,315 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As of December 31, 2025 | | | Amortized
Cost | | Unrealized
Gains | | Unrealized
Losses | | Fair
Value | | U.S. debt | | $ | 142,790 | | | $ | — | | | $ | 27,440 | | | $ | 115,350 | | | Foreign government obligations | | 67,091 | | | — | | | 12,935 | | | 54,156 | | | Supranational debt | | 30,123 | | | 59 | | | 1,906 | | | 28,276 | | | U.S. government obligations | | 24,274 | | | — | | | 4,884 | | | 19,390 | | | Total | | $ | 264,278 | | | $ | 59 | | | $ | 47,165 | | | $ | 217,172 | |
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