STOCK-BASED COMPENSATION (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Oct. 03, 2021 |
Sep. 27, 2020 |
Oct. 03, 2021 |
Sep. 27, 2020 |
Jun. 28, 2015 |
|
| Stock-based compensation | |||||
| Stock-based compensation expense | $ 294 | $ 174 | $ 932 | $ 422 | |
| Stock Options | |||||
| Stock-based compensation | |||||
| Stock-based compensation expense | 62 | 110 | 245 | 235 | |
| Restricted Stock | |||||
| Stock-based compensation | |||||
| Stock-based compensation expense | $ 232 | $ 64 | $ 687 | $ 187 | |
| Employees and Directors | Stock Options | |||||
| Stock-based compensation | |||||
| Expiration period | 10 years | ||||
| Employees and Directors | Minimum | Stock Options | |||||
| Stock-based compensation | |||||
| Vesting period | 2 years | ||||
| Employees and Directors | Maximum | Stock Options | |||||
| Stock-based compensation | |||||
| Vesting period | 5 years | ||||
| 2015 Plan | |||||
| Stock-based compensation | |||||
| Shares authorized for issuance | 2,000,000 | ||||
| Shares available for grant | 723,690 | 723,690 | |||
| 2005 Plan | |||||
| Stock-based compensation | |||||
| Shares available for grant | 0 | 0 | |||