FAIR VALUE MEASUREMENTS - Financial Instruments Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Fair Value on a Recurring Basis
Marketable securities	$ 341,478	$ 422,069
Recurring basis
Fair Value on a Recurring Basis
Assets	378,581	474,121
Recurring basis \| U.S. Treasury securities
Fair Value on a Recurring Basis
Marketable securities	22,881	30,570
Recurring basis \| Government-sponsored enterprise securities
Fair Value on a Recurring Basis
Marketable securities	5,000	8,748
Recurring basis \| Commercial paper
Fair Value on a Recurring Basis
Marketable securities	123,238	185,201
Recurring basis \| Corporate notes
Fair Value on a Recurring Basis
Marketable securities	190,268	202,527
Recurring basis \| Money market funds
Fair Value on a Recurring Basis
Cash, cash equivalents and restricted cash	31,867	46,802
Recurring basis \| Certificate of deposit
Fair Value on a Recurring Basis
Cash, cash equivalents and restricted cash	274	273
Recurring basis \| Municipal securities
Fair Value on a Recurring Basis
Cash, cash equivalents and restricted cash	5,054
Recurring basis \| Level 1
Fair Value on a Recurring Basis
Assets	32,140	47,075
Recurring basis \| Level 1 \| U.S. Treasury securities
Fair Value on a Recurring Basis
Marketable securities	0	0
Recurring basis \| Level 1 \| Government-sponsored enterprise securities
Fair Value on a Recurring Basis
Marketable securities	0	0
Recurring basis \| Level 1 \| Commercial paper
Fair Value on a Recurring Basis
Marketable securities	0	0
Recurring basis \| Level 1 \| Corporate notes
Fair Value on a Recurring Basis
Marketable securities	0	0
Recurring basis \| Level 1 \| Money market funds
Fair Value on a Recurring Basis
Cash, cash equivalents and restricted cash	31,867	46,802
Recurring basis \| Level 1 \| Certificate of deposit
Fair Value on a Recurring Basis
Cash, cash equivalents and restricted cash	274	273
Recurring basis \| Level 1 \| Municipal securities
Fair Value on a Recurring Basis
Cash, cash equivalents and restricted cash	0
Recurring basis \| Level 2
Fair Value on a Recurring Basis
Assets	346,441	427,046
Recurring basis \| Level 2 \| U.S. Treasury securities
Fair Value on a Recurring Basis
Marketable securities	22,881	30,570
Recurring basis \| Level 2 \| Government-sponsored enterprise securities
Fair Value on a Recurring Basis
Marketable securities	5,000	8,748
Recurring basis \| Level 2 \| Commercial paper
Fair Value on a Recurring Basis
Marketable securities	123,238	185,201
Recurring basis \| Level 2 \| Corporate notes
Fair Value on a Recurring Basis
Marketable securities	190,268	202,527
Recurring basis \| Level 2 \| Money market funds
Fair Value on a Recurring Basis
Cash, cash equivalents and restricted cash	0	0
Recurring basis \| Level 2 \| Certificate of deposit
Fair Value on a Recurring Basis
Cash, cash equivalents and restricted cash	0	0
Recurring basis \| Level 2 \| Municipal securities
Fair Value on a Recurring Basis
Cash, cash equivalents and restricted cash	5,054
Recurring basis \| Level 3
Fair Value on a Recurring Basis
Assets	0	0
Recurring basis \| Level 3 \| U.S. Treasury securities
Fair Value on a Recurring Basis
Marketable securities	0	0
Recurring basis \| Level 3 \| Government-sponsored enterprise securities
Fair Value on a Recurring Basis
Marketable securities	0	0
Recurring basis \| Level 3 \| Commercial paper
Fair Value on a Recurring Basis
Marketable securities	0	0
Recurring basis \| Level 3 \| Corporate notes
Fair Value on a Recurring Basis
Marketable securities	0	0
Recurring basis \| Level 3 \| Money market funds
Fair Value on a Recurring Basis
Cash, cash equivalents and restricted cash	0	0
Recurring basis \| Level 3 \| Certificate of deposit
Fair Value on a Recurring Basis
Cash, cash equivalents and restricted cash	0	$ 0
Recurring basis \| Level 3 \| Municipal securities
Fair Value on a Recurring Basis
Cash, cash equivalents and restricted cash	$ 0

Cash And Cash Equivalents And Restricted Cash, Fair Value Disclosure

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- Definition

Fair value portion of asset recognized for present right to economic benefit.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 100
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
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- Definition

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.

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