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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Schedule of Debt Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Debt and Equity Securities, FV-NI [Line Items]
Total debt investments	$ 493,330	$ 252,946
Cash and cash equivalents:
Debt and Equity Securities, FV-NI [Line Items]
Total debt investments	284,442	52,794
Cash and cash equivalents: | Level 1 | Money market funds
Debt and Equity Securities, FV-NI [Line Items]
Total debt investments	284,442	52,794
Short-term investments:
Debt and Equity Securities, FV-NI [Line Items]
Total debt investments	208,888	200,152
Short-term investments: | Level 1 | U.S. government securities
Debt and Equity Securities, FV-NI [Line Items]
Total debt investments	45,403	19,075
Short-term investments: | Level 2 | Corporate bonds
Debt and Equity Securities, FV-NI [Line Items]
Total debt investments	150,671	171,117
Short-term investments: | Level 2 | Asset-backed securities
Debt and Equity Securities, FV-NI [Line Items]
Total debt investments	$ 12,814	$ 9,960

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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
-Publisher FASB
-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
-Topic 944
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-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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-Paragraph 1
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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