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FAIR VALUE MEASUREMENTS (Tables) | 3 Months Ended
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Mar. 31, 2024
Fair Value Disclosures [Abstract] |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis | The following table provides the assets and liabilities carried at fair value measured on a recurring basis as of March 31, 2024 (in thousands):
|  |  |  |  | Fair Value Measurements, Using |
|  | Total Carrying Value as of March 31, 2024 |  |  | Quoted Prices in Active Markets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
Short-term U.S. Government bonds |  | $ | 464,408 |  |  | $ | 464,408 |  |  | $ | — |  |  | $ | — |
Long-term U.S. Government bonds |  |  | 298,893 |  |  |  | 298,893 |  |  |  | — |  |  |  | — |
Cash equivalents |  |  | 3,247 |  |  |  | 3,247 |  |  |  | — |  |  |  | — |
Short-term Corporate bonds |  |  | 796 |  |  |  | 796 |  |  |  | — |  |  |  | — |
Short-term Marketable securities |  |  | 89 |  |  |  | 89 |  |  |  | — |  |  |  | — |
The following table provides the assets and liabilities carried at fair value measured on a recurring basis as of December 31, 2023 (in thousands):
|  |  |  |  | Fair Value Measurements, Using |
|  | Total Carrying Value as of December 31, 2023 |  |  | Quoted Prices in Active Markets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
Short-term U.S. Government bonds |  | $ | 420,378 |  |  | $ | 420,378 |  |  | $ | — |  |  | $ | — |
Long-term U.S. Government bonds |  |  | 285,502 |  |  |  | 285,502 |  |  |  | — |  |  |  | — |
Short-term Corporate bonds |  |  | 1,759 |  |  |  | 1,759 |  |  |  | — |  |  |  | — |
Cash equivalents |  |  | 268 |  |  |  | 268 |  |  |  | — |  |  |  | — |
Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. Level 3 inputs are unobservable inputs based on management’s own assumptions used to measure assets and liabilities at fair value. A financial asset’s or liability’s classification is determined based on the lowest level input that is significant to the fair value measurement.

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: 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 Reference 2: 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 + Details
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