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SHARE-BASED COMPENSATION (Details Textual) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 28, 2020 | Jun. 30, 2019 | Jun. 28, 2020 | Jun. 30, 2019 | Dec. 29, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Options converted |  |  |  | 22,240 |
Shares outstanding | 10,306,986 |  | 10,306,986 |  | 10,309,236
Employee Stock Option |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share based compensation expense | $ 200,000 | $ 200,000 | $ 400,000 | $ 500,000 |
Unamortized stock compensation expense | 1,300,000 |  | $ 1,300,000 |  |
Unamortized stock compensation expense, recognition period |  |  | 2 years 4 months 24 days |  |
Shares issued in period |  |  |  | 9,298 |
Restricted stock |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share based compensation expense | $ 100,000 | 100,000 | $ 100,000 | $ 100,000 |
Shares outstanding | 18,000 |  | 18,000 |  | 27,000
Granted (in dollars per share) |  |  | $ 28.61 |  |
Warrant |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share based compensation expense | $ 0 | $ 0 |  |  |
Non-option equity instruments, nonvested, number of shares | 0 |  | 0 |  | 0
Shares issued in period |  |  |  | 423 |
Options converted |  |  |  | 1,020 |

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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