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ORGANIZATION, BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Change in Accounting Estimate [Line Items]
Capital resources	$ 241,000	$ 241,000
Net income (loss)		21,133	$ (43,977)	$ (192,300)	$ (178,300)
Accumulated deficit	1,127,412	1,127,412		$ 1,148,545
Letter of credit established as a deposit	1,500	$ 1,500
Kite Pharma, Inc.
Change in Accounting Estimate [Line Items]
Change in estimate of transaction price, increase in revenue	8,900
Increase in net income	$ 8,900
Increased earnings per share, basic (in dollars per share)	$ 0.06
Increased earnings per share, diluted (in dollars per share)	$ 0.05

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