FAIR VALUE MEASUREMENT - Reconciliation (Details) $ in Thousands |
3 Months Ended |
|---|---|
|
Mar. 28, 2020
USD ($)
| |
| FAIR VALUE MEASUREMENT | |
| Beginning balance | $ 496 |
| Change due to vesting of awards granted | 166 |
| Change in fair value measurement of liability | (52) |
| Ending balance | 610 |
| PE and PEAR awards | Level 3 | |
| FAIR VALUE MEASUREMENT | |
| Beginning balance | 496 |
| Change due to vesting of awards granted | 166 |
| Change in fair value measurement of liability | (52) |
| Ending balance | $ 610 |