FINANCIAL INSTRUMENTS - Schedule of Fair Value Inputs and Valuation (Details) - Level 3 - Contingent Consideration	Dec. 31, 2021
Minimum | Flexion Acquisition | Discount rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration, liability, measurement input	0.1139
Minimum | Flexion Acquisition | Probability of achieving regulatory milestones
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration, liability, measurement input	0.1000
Minimum | Myoscience Acquisition | Discount rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration, liability, measurement input	0.1142
Minimum | Myoscience Acquisition | Probability of achieving regulatory milestones
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration, liability, measurement input	0.0100
Maximum | Flexion Acquisition | Discount rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration, liability, measurement input	0.1292
Maximum | Flexion Acquisition | Probability of achieving regulatory milestones
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration, liability, measurement input	0.1500
Maximum | Myoscience Acquisition | Discount rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration, liability, measurement input	0.1213