FAIR VALUE - Summary of Changes in Fair Value of All Financial Liabilities (Details) - Contingent consideration - Level 3 - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
| Fair value, beginning of the period | $ 38,552 | $ 168 |
| Contingent consideration acquired with Zyla Merger | 0 | 39,900 |
| Cash payment related to contingent consideration | (4,807) | (3,016) |
| Fair value, end of the period | 37,659 | 38,552 |
| Costs and expenses | ||
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
| Changes in fair value | $ 3,914 | $ 1,500 |