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FINANCIAL INSTRUMENTS - Narrative (Details)	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Nov. 30, 2021 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) wholesaler	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) wholesaler	Aug. 30, 2022 USD ($)
Concentration Risk [Line Items]
Changes in contingent consideration				$ (5,541,000)	$ (3,847,000)
Interest receivable		$ 300,000		$ 300,000		$ 400,000
Number of major customers | wholesaler				3		3
Amount of allowance for doubtful accounts						$ 0
Major Customer One | Accounts Receivable | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk (as a percent)				38.00%		37.00%
Major Customer Two | Accounts Receivable | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk (as a percent)				18.00%		19.00%
Major Customer Three | Accounts Receivable | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk (as a percent)				16.00%		16.00%
iovera°
Concentration Risk [Line Items]
Amount of allowance for doubtful accounts		$ 300,000		$ 300,000
Minimum
Concentration Risk [Line Items]
Maturities		1 year		1 year
Maximum
Concentration Risk [Line Items]
Maturities		3 years		3 years
Flexion And MyoScience Acquisition
Concentration Risk [Line Items]
Acquisition-related contingent consideration		$ 19,200,000		$ 19,200,000		$ 24,700,000
Flexion
Concentration Risk [Line Items]
Acquisition-related contingent consideration	$ 372,300,000						$ 425,500,000
Payment term	60 days
Changes in contingent consideration		$ (3,200,000)	$ 2,800,000	$ (5,500,000)	$ (3,800,000)
Flexion | Weighted Average | Level 3 | Contingent Consideration | Discount rates
Concentration Risk [Line Items]
Measurement input, contingent consideration		0.079		0.079
Flexion | Minimum | Level 3 | Contingent Consideration | Discount rates
Concentration Risk [Line Items]
Measurement input, contingent consideration		0.073		0.073
Flexion | Maximum | Level 3 | Contingent Consideration | Discount rates
Concentration Risk [Line Items]
Measurement input, contingent consideration		0.086		0.086

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