PRODUCT REVENUE AND PROVISIONS FOR VARIABLE CONSIDERATION - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Product revenue, net
Disaggregation of Revenue [Line Items]
Accounts receivable, net	$ 44.4	$ 32.4

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

Akebia Therapeutics, Inc. 10-K