BUSINESS COMBINATIONS - Unaudited Pro Forma Consolidated Financial Information (Details) - Obagi and Milk Business Combinations - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Business Acquisition [Line Items]
Pro forma net revenue	$ 200,547	$ 162,583
Pro forma net income (loss)	(86,930)	(145,152)
Less: Pro forma net income (loss) attributable to noncontrolling interest	(25,140)	(26,519)
Pro forma net income (loss) attributable to Waldencast plc	$ (61,790)	$ (118,633)

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479907/805-20-50-5

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479328/805-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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