STOCK-BASED COMPENSATION - Schedule of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Stock-based compensation | ||
| Total | $ 3,545 | $ 10,924 |
| Cost of sales (excluding amortization of intangible assets) | ||
| Stock-based compensation | ||
| Total | 0 | 92 |
| Research and development expenses | ||
| Stock-based compensation | ||
| Total | 0 | 268 |
| Selling, general and administrative expenses | ||
| Stock-based compensation | ||
| Total | 3,545 | 9,565 |
| Restructuring charges | ||
| Stock-based compensation | ||
| Total | $ 0 | $ 999 |