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ORGANIZATION, BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Revenues from Collaboration and Licensing Agreements (Details) - Revenue from Contract with Customer - Revenue from Collaboration and Licensing Agreements	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Genentech, Inc.
Concentration Risk [Line Items]
Percentage of revenues	87.00%	0.00%
Astellas Gene Therapies, Inc.
Concentration Risk [Line Items]
Percentage of revenues	11.00%	0.00%
Other licensing agreements
Concentration Risk [Line Items]
Percentage of revenues	2.00%	11.00%
Biogen MA, Inc.
Concentration Risk [Line Items]
Percentage of revenues	0.00%	77.00%
Kite Pharma, Inc.
Concentration Risk [Line Items]
Percentage of revenues	0.00%	12.00%

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