ACCRUED EXPENSES (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accrued Expenses [Line Items]
Accrued selling, general and administrative expenses	$ 12,063	$ 23,288
Accrued research and development expenses	5,480	6,682
Other accrued operating expenses	14,912	11,196
Compensation and benefits	45,491	22,202
Accrued royalties	35,298	3,040
Accrued interest	5,358	2,376
Product returns and wholesaler service fees	8,953	2,190
Total	127,555	$ 70,974
When annual net sales collected reach $500.0 million
Accrued Expenses [Line Items]
Milestone payments for EXPAREL agreed in connection with acquisition	32,000
Annual net sales threshold	$ 500,000