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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Schedule of Debt Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Debt and Equity Securities, FV-NI [Line Items]
Total debt investments	$ 416,766	$ 438,533
Cash and cash equivalents:
Debt and Equity Securities, FV-NI [Line Items]
Total debt investments	217,131	18,828
Cash and cash equivalents: | Level 1 | Money market funds
Debt and Equity Securities, FV-NI [Line Items]
Total debt investments	217,131	18,828
Short-term investments:
Debt and Equity Securities, FV-NI [Line Items]
Total debt investments	199,635	419,705
Short-term investments: | Level 1 | U.S. government securities
Debt and Equity Securities, FV-NI [Line Items]
Total debt investments	5,978	37,805
Short-term investments: | Level 2 | U.S. agency securities
Debt and Equity Securities, FV-NI [Line Items]
Total debt investments	0	9,804
Short-term investments: | Level 2 | Corporate bonds
Debt and Equity Securities, FV-NI [Line Items]
Total debt investments	189,242	364,926
Short-term investments: | Level 2 | Asset-backed securities
Debt and Equity Securities, FV-NI [Line Items]
Total debt investments	$ 4,415	$ 7,170

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- Definition

Amount, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), investment in debt security measured at amortized cost (held-to-maturity), and investment in debt security measured at fair value with change in fair value recognized in net income (trading).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 80
-Name Accounting Standards Codification
-Section 55
-Paragraph 14
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-URI https://asc.fasb.org/1943274/2147480078/944-80-55-14

Reference 2: http://www.xbrl.org/2003/role/exampleRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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