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INTANGIBLE ASSET AND GOODWILL (Tables)
 6 Months Ended
Jun. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets
Intangible asset, net of accumulated amortization, prior impairments and adjustments as of June 30, 2024 and December 31, 2023 consisted of the following (in thousands):  
 June 30, 2024December 31, 2023
Intangible asset:Gross Carrying
Value		Accumulated AmortizationNet Book ValueNet Book ValueEstimated Useful Life
Developed product rights for Auryxia$214,705 $(196,684)$18,021 $36,042 6 years