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FAIR VALUE (Tables) | 6 Months Ended
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Jun. 30, 2025
Fair Value Disclosures [Abstract] |
Schedule of Net Unrealized Gains (Losses), and Fair Value by Major Security Type for Our Investments | The following table presents amortized cost, gross unrealized gains and losses, and fair value by major security type and balance sheet classification as of June 30, 2025 and December 31, 2024:
As of June 30, 2025
(In thousands) | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value |  | Cash Equivalents |  | Short-Term Investments |  | Long-Term Investments
Cash | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 90,505 |  |  | $ | 90,505 |  |  | $ | — |  |  | $ | — |
Level 1 |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper | $ | 13,199 |  |  | $ | 2 |  |  | $ | — |  |  | $ | 13,201 |  |  | $ | 1,000 |  |  | $ | 12,199 |  |  | $ | — |
Money market funds | 884,726 |  |  | — |  |  | — |  |  | 884,726 |  |  | 884,726 |  |  | — |  |  | — |
Subtotal | $ | 897,925 |  |  | $ | 2 |  |  | $ | — |  |  | $ | 897,927 |  |  | $ | 885,726 |  |  | $ | 12,199 |  |  | $ | — |
Level 2 |  |  |  |  |  |  |  |  |  |  |  |  |
Asset-backed securities | $ | 22,361 |  |  | $ | 17 |  |  | $ | (1) |  |  | $ | 22,377 |  |  | $ | — |  |  | $ | 151 |  |  | $ | 22,209 |
Certificates of deposit | 15,520 |  |  | — |  |  | (4) |  |  | 15,516 |  |  | — |  |  | 15,520 |  |  | — |
Corporate debt securities | 119,444 |  |  | 51 |  |  | (128) |  |  | 119,367 |  |  | — |  |  | 93,782 |  |  | 25,662 |
U.S. Treasury securities | 26,091 |  |  | 91 |  |  | (3) |  |  | 26,179 |  |  | — |  |  | — |  |  | 26,091 |
Subtotal | $ | 183,416 |  |  | $ | 159 |  |  | $ | (136) |  |  | $ | 183,439 |  |  | $ | — |  |  | $ | 109,453 |  |  | $ | 73,962 |
Level 3 |  |  |  |  |  |  |  |  |  |  |  |  |
Investment in SAFE | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 1,400 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,400 |
Subtotal | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 1,400 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,400 |
Total | $ | 1,081,341 |  |  | $ | 161 |  |  | $ | (136) |  |  | $ | 1,173,271 |  |  | $ | 976,231 |  |  | $ | 121,652 |  |  | $ | 75,362 |
As of December 31, 2024
(In thousands) | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value |  | Cash Equivalents |  | Short-Term Investments |  | Long-Term Investments
Cash | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 73,351 |  |  | $ | 73,351 |  |  | $ | — |  |  | $ | — |
Level 1 |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper | $ | 15,659 |  |  | $ | 2 |  |  | $ | (1) |  |  | $ | 15,661 |  |  | $ | — |  |  | $ | 15,659 |  |  | $ | — |
Money market funds | 712,440 |  |  | — |  |  | — |  |  | 712,440 |  |  | 712,440 |  |  | — |  |  | — |
Subtotal | $ | 728,099 |  |  | $ | 2 |  |  | $ | (1) |  |  | $ | 728,101 |  |  | $ | 712,440 |  |  | $ | 15,659 |  |  | $ | — |
Level 2 |  |  |  |  |  |  |  |  |  |  |  |  |
Asset-backed securities | $ | 16,280 |  |  | $ | 10 |  |  | $ | (1) |  |  | $ | 16,289 |  |  | $ | — |  |  | $ | 697 |  |  | $ | 15,583 |
Certificates of deposit | 11,521 |  |  | — |  |  | (14) |  |  | 11,507 |  |  | — |  |  | 11,521 |  |  | — |
Corporate debt securities | 126,031 |  |  | 7 |  |  | (494) |  |  | 125,543 |  |  | — |  |  | 55,013 |  |  | 71,018 |
U.S. Treasury securities | 19,255 |  |  | 2 |  |  | (61) |  |  | 19,195 |  |  | — |  |  | 8,964 |  |  | 10,291 |
Subtotal | $ | 173,087 |  |  | $ | 19 |  |  | $ | (570) |  |  | $ | 172,534 |  |  | $ | — |  |  | $ | 76,195 |  |  | $ | 96,892 |
Level 3 |  |  |  |  |  |  |  |  |  |  |  |  |
Investment in SAFE | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 1,400 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,400 |
Subtotal | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 1,400 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,400 |
Total | $ | 901,186 |  |  | $ | 21 |  |  | $ | (571) |  |  | $ | 975,386 |  |  | $ | 785,791 |  |  | $ | 91,854 |  |  | $ | 98,292 |

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- Definition Tabular disclosure of liabilities measured at fair value measured on a recurring or nonrecurring basis. Includes, but is not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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