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SEGMENT INFORMATION - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
Revenues	$ 6,437	$ 481
Less:
Research and development	26,006	35,891
General and administrative	10,059	11,767
Impairment of long-lived assets	0	4,349
Stock-based compensation	2,596	2,719
Net income (loss)	(30,597)	(49,089)
Reportable Segment
Segment Reporting Information [Line Items]
Revenues	6,437	481
Less:
Research and development	15,111	21,166
General and administrative	9,268	10,177
Clinical manufacturing operations	0	4,349
Impairment of goodwill and indefinite-lived intangible assets	9,656	12,555
Stock-based compensation	2,596	2,719
Other segment items	403	(1,396)
Net income (loss)	$ (30,597)	$ (49,089)

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