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SHARE-BASED COMPENSATION- Stock Warrants (Details) - USD ($) | 12 Months Ended
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Dec. 30, 2018 | Dec. 31, 2017 | Dec. 25, 2016 | Dec. 27, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] |  |  |  |
Exercised | 86,053 | 13,800 | 87,655 |
Warrant |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Compensation cost related to stock awards | $ 0 | $ 0 | $ 0 |
Unamortized stock compensation expense | $ 0 |  |  |
Unamortized stock compensation expense, recognition period | 0 years |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] |  |  |  |
Weighted-average fair value of warrants |  |  | $ 2.48 |
Weighted-average risk-free interest rate |  |  | 0.60% |
Weighted-average dividend yield |  |  | 100.00% |
Weighted-average volatility factor |  |  | 43.20% |
Weighted-average expected life |  |  | 3 years |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] |  |  |  |
Warrants outstanding at beginning of period (in shares) | 123,984 | 123,984 | 133,833 |
Granted | 0 | 0 | 32,250 |
Exercised | (30,768) | 0 | (42,099) |
Expired | 0 | 0 | 0 |
Warrants outstanding at ending of period (in shares) | 93,216 | 123,984 | 123,984 | 133,833
Warrants exercisable (in shares) | 93,216 | 123,984 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Weighted Average Exercise Price [Abstract] [Abstract] |  |  |  |
Warrants outstanding at beginning of period (in dollars per share) | $ 11.51 | $ 11.51 | $ 10.21 |
Granted | 0.00 | 0.00 | 16.80 |
Exercised | 11.27 | 0.00 | 11.42 |
Expired | 0.00 | 0.00 | 0.00 |
Warrants outstanding at ending of period (in dollars per share) | 11.59 | 11.51 | $ 11.51 | $ 10.21
Warrants exercisable (in dollars per share) | $ 11.59 | $ 11.51 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Additional Disclosures [Abstract] |  |  |  |
Warrants outstanding, weighted remaining contractual life | 1 year 3 months 11 days | 2 years 2 months 9 days | 2 years 9 months 22 days | 3 years 6 months 15 days
Warrants exercisable, weighted remaining contractual life | 1 year 3 months 11 days | 2 years 2 months 9 days |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Intrinsic Value [Abstract] |  |  |  |
Warrants outstanding at beginning of period | $ 577,000 | $ 532,000 | $ 634,000 |
Warrants outstanding at ending of period | 805,000 | 577,000 | $ 532,000 | $ 634,000
Warrants exercisable, total intrinsic value | $ 805,000 | $ 577,000 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] |  |  |  |
Nonvested, number of warrants | 0 | 0 |  |
Nonvested warrants, weighted average grant date fair value | $ 0.00 | $ 0.00 |  |
Conversion of stock, shares issued | 16,623 | 0 | 17,910 |
Exercised | 30,768 | 0 | 42,099 |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + 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=109197908&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=109197908&loc=d3e5070-113901 + Details
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- Definition Unrecognized cost of unvested options awarded to employees as compensation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 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.D.2) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 + Details
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