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FAIR VALUE MEASUREMENTS - Schedule of Fair Value (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Fair value measurements |  |
Equity securities | $ 2,745 | $ 5,149
Non-marketable securities | 9,057 | 10,065
Contingent consideration | 293,777 | 306,927
Fair Value, Recurring |  |
Fair value measurements |  |
Restricted cash | 297 | 297
Equity securities | 2,745 | 5,149
Non-marketable securities | 9,057 | 10,065
Contingent consideration |  | 306,927
Contingent consideration | (293,777) |
Total | 449,983 | 335,492
Fair Value, Recurring | Corporate bonds |  |
Fair value measurements |  |
Estimated Fair Value | 55,110 | 114,671
Fair Value, Recurring | Commercial paper |  |
Fair value measurements |  |
Estimated Fair Value | 8,902 |
Fair Value, Recurring | U.S. government agency securities |  |
Fair value measurements |  |
Estimated Fair Value | 42,932 | 225,223
Fair Value, Recurring | Asset backed securities |  |
Fair value measurements |  |
Estimated Fair Value | 30,105 | 44,521
Fair Value, Recurring | Cash and money market |  |
Fair value measurements |  |
Cash and cash equivalents, fair value | 543,316 | 178,168
Fair Value, Recurring | Commercial paper |  |
Fair value measurements |  |
Cash and cash equivalents, fair value | 49,806 | 63,021
Fair Value, Recurring | U.S. government agency securities |  |
Fair value measurements |  |
Cash and cash equivalents, fair value | 1,490 | 1,304
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring |  |
Fair value measurements |  |
Restricted cash | 297 | 297
Equity securities | 2,745 | 5,149
Non-marketable securities | 0 | 0
Contingent consideration |  | 0
Contingent consideration | 0 |
Total | 546,358 | 183,614
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring | Corporate bonds |  |
Fair value measurements |  |
Estimated Fair Value | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring | Commercial paper |  |
Fair value measurements |  |
Estimated Fair Value | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring | U.S. government agency securities |  |
Fair value measurements |  |
Estimated Fair Value | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring | Asset backed securities |  |
Fair value measurements |  |
Estimated Fair Value | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring | Cash and money market |  |
Fair value measurements |  |
Cash and cash equivalents, fair value | 543,316 | 178,168
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring | Commercial paper |  |
Fair value measurements |  |
Cash and cash equivalents, fair value | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring | U.S. government agency securities |  |
Fair value measurements |  |
Cash and cash equivalents, fair value | 0 | 0
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring |  |
Fair value measurements |  |
Restricted cash | 0 | 0
Equity securities | 0 | 0
Non-marketable securities | 0 | 0
Contingent consideration |  | 0
Contingent consideration | 0 |
Total | 188,345 | 448,740
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring | Corporate bonds |  |
Fair value measurements |  |
Estimated Fair Value | 55,110 | 114,671
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring | Commercial paper |  |
Fair value measurements |  |
Estimated Fair Value | 8,902 |
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring | U.S. government agency securities |  |
Fair value measurements |  |
Estimated Fair Value | 42,932 | 225,223
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring | Asset backed securities |  |
Fair value measurements |  |
Estimated Fair Value | 30,105 | 44,521
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring | Cash and money market |  |
Fair value measurements |  |
Cash and cash equivalents, fair value | 0 | 0
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring | Commercial paper |  |
Fair value measurements |  |
Cash and cash equivalents, fair value | 49,806 | 63,021
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring | U.S. government agency securities |  |
Fair value measurements |  |
Cash and cash equivalents, fair value | 1,490 | 1,304
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring |  |
Fair value measurements |  |
Restricted cash | 0 | 0
Equity securities | 0 | 0
Non-marketable securities | 9,057 | 10,065
Contingent consideration |  | 306,927
Contingent consideration | (293,777) |
Total | (284,720) | (296,862)
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | Corporate bonds |  |
Fair value measurements |  |
Estimated Fair Value | 0 | 0
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | Commercial paper |  |
Fair value measurements |  |
Estimated Fair Value | 0 |
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | U.S. government agency securities |  |
Fair value measurements |  |
Estimated Fair Value | 0 | 0
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | Asset backed securities |  |
Fair value measurements |  |
Estimated Fair Value | 0 | 0
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | Cash and money market |  |
Fair value measurements |  |
Cash and cash equivalents, fair value | 0 | 0
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | Commercial paper |  |
Fair value measurements |  |
Cash and cash equivalents, fair value | 0 | 0
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | U.S. government agency securities |  |
Fair value measurements |  |
Cash and cash equivalents, fair value | $ 0 | $ 0

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