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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Marketable Securities, Available For Sale
Cash and cash equivalents	$ 43,485	$ 86,097
Fair Value, Recurring
Marketable Securities, Available For Sale
Amortized Cost Basis, Marketable securities, available for sale	512,609	318,094
Unrealized Gain, Marketable securities, available for sale	11	248
Unrealized Losses, Marketable securities, available for sale	(1,065)	(149)
Fair Market Value, Marketable securities, available for sale	511,555	318,193
Fair Value, Recurring | Level 1 | Money market funds
Marketable Securities, Available For Sale
Cash and cash equivalents	43,289	85,897
Cash equivalents, Fair Market Value	43,289	85,897
Fair Value, Recurring | Level 2 | Commercial paper
Marketable Securities, Available For Sale
Amortized Cost Basis, Marketable securities, available for sale	24,943	19,457
Unrealized Gain, Marketable securities, available for sale		13
Unrealized Losses, Marketable securities, available for sale	(24)	(8)
Fair Market Value, Marketable securities, available for sale	24,919	19,462
Fair Value, Recurring | Level 2 | Asset-backed securities
Marketable Securities, Available For Sale
Amortized Cost Basis, Marketable securities, available for sale	51,995	10,228
Unrealized Gain, Marketable securities, available for sale	1	12
Unrealized Losses, Marketable securities, available for sale	(155)	(2)
Fair Market Value, Marketable securities, available for sale	51,841	10,238
Fair Value, Recurring | Level 2 | Corporate debt securities
Marketable Securities, Available For Sale
Amortized Cost Basis, Marketable securities, available for sale	159,931	82,514
Unrealized Gain, Marketable securities, available for sale	8	66
Unrealized Losses, Marketable securities, available for sale	(305)	(113)
Fair Market Value, Marketable securities, available for sale	159,634	82,467
Fair Value, Recurring | Level 2 | U.S. government treasury and agency securities
Marketable Securities, Available For Sale
Amortized Cost Basis, Marketable securities, available for sale	199,150	116,579
Unrealized Gain, Marketable securities, available for sale	2	151
Unrealized Losses, Marketable securities, available for sale	(503)	(26)
Fair Market Value, Marketable securities, available for sale	198,649	116,704
Fair Value, Recurring | Level 2 | Supranational and sovereign government securities
Marketable Securities, Available For Sale
Amortized Cost Basis, Marketable securities, available for sale	33,301	3,419
Unrealized Gain, Marketable securities, available for sale		6
Unrealized Losses, Marketable securities, available for sale	(78)
Fair Market Value, Marketable securities, available for sale	$ 33,223	$ 3,425

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- Definition

Amortized cost 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/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479130/326-30-45-1

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
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-Publisher FASB
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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