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ORGANIZATION, BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenues from Strategic Partnering Collaboration And Licensing Agreements (Details) - Revenue from contract with customer - Customer concentration risk	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023
Novartis Institutes for BioMedical Research, Inc.
Concentration Risk [Line Items]
Percentage of revenues	35.00%	7.00%
Biogen MA, Inc.
Concentration Risk [Line Items]
Percentage of revenues	32.00%	82.00%
Kite Pharma, Inc.
Concentration Risk [Line Items]
Percentage of revenues	18.00%	8.00%
Other license agreements
Concentration Risk [Line Items]
Percentage of revenues	15.00%	3.00%

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- Definition

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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