COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Oct. 31, 2020	Mar. 31, 2019	Dec. 31, 2021	Dec. 31, 2019	Sep. 30, 2019	Feb. 28, 2017
Long-term Purchase Commitment [Line Items]
Litigation investigation term		5 years
Department of Justice settlement				$ 3.5
One-time Termination Benefits
Long-term Purchase Commitment [Line Items]
Total costs, of one-time benefits, estimate			$ 1.1
Termination of Nuance agreement			0.7
Service
Long-term Purchase Commitment [Line Items]
Purchase obligation			50.3
Raw Materials
Long-term Purchase Commitment [Line Items]
Purchase obligation			$ 9.2
Fortis
Long-term Purchase Commitment [Line Items]
Loss contingency, damages sought	$ 30.0
GeneQuine | Flexion | Achievement of Development and Regulatory Milestones
Long-term Purchase Commitment [Line Items]
Collaborative arrangement, milestone payments to be received						$ 56.0
Xenon Pharmaceuticals, Inc | Flexion | Achievement of Development and Regulatory Milestones
Long-term Purchase Commitment [Line Items]
Collaborative arrangement, milestone payments to be received					$ 45.8
Xenon Pharmaceuticals, Inc | Flexion | Achievement of Sales-Related Milestones
Long-term Purchase Commitment [Line Items]
Collaborative arrangement, milestone payments to be received					$ 75.0