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SHARE-BASED COMPENSATION (Details Textual) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 27, 2020 | Sep. 29, 2019 | Sep. 27, 2020 | Sep. 29, 2019 | Dec. 29, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Options converted |  |  |  | 38,614 |
Employee Stock Option |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share based compensation expense | $ 200,000 | $ 200,000 | $ 400,000 | $ 600,000 |
Unamortized stock compensation expense | 1,000,000.0 |  | $ 1,000,000.0 |  |
Unamortized stock compensation expense, recognition period |  |  | 2 years 8 months 12 days |  |
Shares issued in period |  |  |  | 16,694 |
Restricted stock |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share based compensation expense | 100,000 | 100,000 | $ 200,000 | $ 200,000 |
Unamortized stock compensation expense | 300,000 |  | $ 300,000 |  |
Unamortized stock compensation expense, recognition period |  |  | 1 year 9 months 18 days |  |
Warrant |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share based compensation expense | $ 0 | $ 0 |  |  |
Shares issued in period |  |  |  | 423 |
Options converted |  |  |  | 1,020 |
Non-option equity instruments, nonvested, number of shares | 0 |  | 0 |  | 0

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