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MARKETABLE SECURITIES (Tables) | 9 Months Ended
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Sep. 30, 2025
Investments, Debt and Equity Securities [Abstract] |
Schedule of Amortized Cost, Gross Unrealized Gains and Losses, and Fair Market Value of AFS Securities | The following tables present the amortized cost, gross unrealized gains and losses, and fair market value of our AFS securities as of September 30, 2025, and December 31, 2024:
|  | September 30, 2025
(In thousands) |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Short-term AFS securities |  |  |  |  |  |  |  |
Corporate debt securities |  | $ | 191,583 |  |  | $ | 531 |  |  | $ | (17) |  |  | $ | 192,097 |
U.S. Treasury securities |  | 171,058 |  |  | 463 |  |  | (5) |  |  | 171,516 |
Certificates of deposit |  | 4,400 |  |  | — |  |  | — |  |  | 4,400 |
Total short-term AFS securities |  | $ | 367,041 |  |  | $ | 994 |  |  | $ | (22) |  |  | $ | 368,013 |
Long-term AFS securities |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 279,007 |  |  | $ | 1,261 |  |  | $ | (41) |  |  | $ | 280,227 |
Corporate debt securities |  | 195,984 |  |  | 685 |  |  | (46) |  |  | 196,623 |
U.S. governmental agency securities |  | 2,582 |  |  | — |  |  | (3) |  |  | 2,579 |
Total long-term AFS securities |  | $ | 477,573 |  |  | $ | 1,946 |  |  | $ | (90) |  |  | $ | 479,429 |
|  | December 31, 2024
(In thousands) |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Short-term AFS securities |  |  |  |  |  |  |  |
Corporate debt securities |  | $ | 153,988 |  |  | $ | 415 |  |  | $ | (28) |  |  | $ | 154,375 |
U.S. Treasury securities |  | 203,238 |  |  | 511 |  |  | (20) |  |  | 203,729 |
Certificates of deposit |  | 4,400 |  |  | — |  |  | — |  |  | 4,400 |
U.S. governmental agency securities |  | 3,974 |  |  | — |  |  | (4) |  |  | 3,970 |
Total short-term AFS securities |  | $ | 365,600 |  |  | $ | 926 |  |  | $ | (52) |  |  | $ | 366,474 |
Long-term AFS securities |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 154,936 |  |  | $ | 258 |  |  | $ | (261) |  |  | $ | 154,933 |
Corporate debt securities |  | 190,772 |  |  | 544 |  |  | (303) |  |  | 191,013 |
Total long-term AFS securities |  | $ | 345,708 |  |  | $ | 802 |  |  | $ | (564) |  |  | $ | 345,946 |
Schedule of Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value | The following tables represent the AFS securities as of September 30, 2025, and December 31, 2024, that were in an unrealized loss position for which an allowance for credit losses has not been recorded, aggregated by investment category and the length of time that individual securities have been in a continuous unrealized loss position:
|  | September 30, 2025
|  | Less than 12 Months |  | 12 Months or Greater |  | Total
(In thousands) |  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
Short-term AFS securities |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt securities |  | $ | 19,510 |  |  | $ | (17) |  |  | $ | 998 |  |  | $ | — |  |  | $ | 20,508 |  |  | $ | (17) |
U.S. Treasury securities |  | 2,017 |  |  | — |  |  | 7,017 |  |  | (5) |  |  | 9,034 |  |  | (5) |
Total short-term AFS securities |  | $ | 21,527 |  |  | $ | (17) |  |  | $ | 8,015 |  |  | $ | (5) |  |  | $ | 29,542 |  |  | $ | (22) |
Long-term AFS securities |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 32,480 |  |  | $ | (30) |  |  | $ | 6,936 |  |  | $ | (11) |  |  | $ | 39,416 |  |  | $ | (41) |
Corporate debt securities |  | 44,062 |  |  | (46) |  |  | — |  |  | — |  |  | 44,062 |  |  | (46) |
U.S. governmental agency securities |  | 2,579 |  |  | (3) |  |  | — |  |  | — |  |  | 2,579 |  |  | (3) |
Total long-term AFS securities |  | $ | 79,121 |  |  | $ | (79) |  |  | $ | 6,936 |  |  | $ | (11) |  |  | $ | 86,057 |  |  | $ | (90) |
|  | December 31, 2024
|  | Less than 12 Months |  | 12 Months or Greater |  | Total
(In thousands) |  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
Short-term AFS securities |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt securities |  | $ | 28,741 |  |  | $ | (28) |  |  | $ | 249 |  |  | $ | — |  |  | $ | 28,990 |  |  | $ | (28) |
U.S. Treasury securities |  | 13,023 |  |  | (18) |  |  | 1,297 |  |  | (2) |  |  | 14,320 |  |  | (20) |
U.S. governmental agency securities |  | — |  |  | — |  |  | 3,971 |  |  | (4) |  |  | 3,971 |  |  | (4) |
Total short-term AFS securities |  | $ | 41,764 |  |  | $ | (46) |  |  | $ | 5,517 |  |  | $ | (6) |  |  | $ | 47,281 |  |  | $ | (52) |
Long-term AFS securities |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 64,325 |  |  | $ | (261) |  |  | $ | — |  |  | $ | — |  |  | $ | 64,325 |  |  | $ | (261) |
Corporate debt securities |  | 68,163 |  |  | (303) |  |  | — |  |  | — |  |  | 68,163 |  |  | (303) |
Total long-term AFS securities |  | $ | 132,488 |  |  | $ | (564) |  |  | $ | — |  |  | $ | — |  |  | $ | 132,488 |  |  | $ | (564) |

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