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Stock Compensation Plans (Tables) | 12 Months Ended
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Dec. 27, 2014
Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract] |
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] | The following table presents a summary of non-vested restricted stock units granted to employees and directors as of December 27, 2014:
|  |  |  | Weighted |
|  | Number of |  | Average Grant |
|  | Shares |  | Date Fair Value |
Non-vested stock units as of December 28, 2013 |  |  | — |  |  |  |
Granted |  |  | 50,000 |  | $ | 10.49 |
Vested |  |  | — |  |  |  |
Forfeited |  |  | — |  |  |  |
Non-vested stock units as of December 27, 2014 |  |  | 50,000 |  | $ | 10.49 |
Vested but unsettled |  |  | 4,500 |  |  |  |
Outstanding non-vested restricted stock units as of December 27, 2014 |  |  | 45,500 |  |  |  |
Schedule of Share-based Compensation, Activity [Table Text Block] | The following table summarizes option activity for each of the three years ended 2014:
|  | Incentive Stock Options |  | Director Stock Options |
|  | Granted |  | Outstanding |  | Granted |  | Outstanding |
2014 |  |  | — |  |  | 284,375 |  |  | 25,000 |  |  | 60,000 |
2013 |  |  | 120,000 |  |  | 559,950 |  |  | 37,500 |  |  | 80,000 |
2012 |  |  | 200,000 |  |  | 607,875 |  |  | 37,500 |  |  | 85,000 |
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] | The fair value of each option grant award is estimated on the grant date using the Black-Scholes-Merton option valuation model using the following assumptions:
|  | 2014 |  | 2013 |  | 2012 |
Risk-free interest rates |  |  | 0.68 | % |  | 0.52 | % |  | 0.84 | %
Dividend yields |  |  | 4.23 | % |  | 5.97 | % |  | 5.50 | %
Volatility factors of expected market price of common stock |  |  | 35.86 | % |  | 48.79% to 74.05 | % |  | 95.56% to 110.39 | %
Weighted average expected life of the options |  |  | 1-4 years |  |  | 1-4 years |  |  | 1-4 years |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] | The following table summarizes stock option transactions for the three years ended 2014:
|  | 2014 |  | 2013 |  | 2012 |
|  |  |  |  | Option |  |  |  |  | Option |  |  |  |  | Option |
|  | Shares |  |  | Price |  | Shares |  |  | Price |  | Shares |  |  | Price |
Outstanding at beginning of year |  |  | 639,950 |  |  | $0.64 to$6.07 |  |  | 692,875 |  |  | $0.64 to 6.07 |  |  | 984,649 |  |  | $0.64 to $9.35 |
Issued during year |  |  | 25,000 |  |  | $11.86 |  |  | 157,500 |  |  | $5.85 to $6.06 |  |  | 237,500 |  |  | $5.28 to $5.66 |
Canceled or expired |  |  | (19,000) |  |  |  |  |  | (27,000) |  |  |  |  |  | (25,024) |  |  |  |
Exercised during year |  |  | (301,575) |  |  | $0.64 to $6.07 |  |  | (183,425) |  |  | $0.64 to $6.07 |  |  | (504,250) |  |  | $0.64 to $2.56 |
Outstanding at end of year |  |  | 344,375 |  |  | $2.56 to $11.86 |  |  | 639,950 |  |  | $0.64 to $6.07 |  |  | 692,875 |  |  | $0.64 to $6.07 |
Exercisable at end of year |  |  | 158,875 |  |  |  |  |  | 198,825 |  |  |  |  |  | 192,625 |  |  |  |
Weighted-average fair value of options granted during the year |  | $ | 3.06 |  |  |  |  | $ | 2.21 |  |  |  |  | $ | 3.12 |  |  |  |
Schedule Of Share Based Compensation Stock Options Outstanding [Table Text Block] | The following table summarizes information about stock options outstanding at December 27, 2014:
| Options Outstanding |  | Options Exercisable |
|  |  | Weighted-Average |  |  |  |  |  |
Range of | Number of |  | Remaining |  | Weighted-Average | Number of |  | Weighted-Average |
Exercise Prices | Shares |  | Contractual Life |  | Exercise Price | Shares |  | Exercise Price |
$2.56 |  |  | 8,625 |  | 0.2 years |  | $ | 2.56 |  |  | 8,625 |  | $ | 2.56 |
$5.28 - $5.66 |  |  | 116,750 |  | 2.2 years |  | $ | 5.29 |  |  | 50,000 |  | $ | 5.30 |
$5.85 - $6.06 |  |  | 97,875 |  | 3.2 years |  | $ | 5.86 |  |  | 34,875 |  | $ | 5.90 |
$6.07 |  |  | 96,125 |  | 1.2 years |  | $ | 6.07 |  |  | 65,375 |  | $ | 6.07 |
$11.86 |  |  | 25,000 |  | 4.2 years |  | $ | 11.86 |  |  |  |  |  |  |
|  |  | 344,375 |  |  |  |  |  |  |  | 158,875 |  |  |  |
Schedule of Nonvested Share Activity [Table Text Block] | During the year ended December 27, 2014, the following activity occurred under the Company’s stock option plan:
|  |  |  | Weighted Average |
|  | Number of |  | Grant Date Fair |
|  | Options |  | Value |
Nonvested balance, beginning of year |  |  | 441,125 |  | $ | 2.79 |
Granted |  |  | 25,000 |  | $ | 2.31 |
Vested |  |  | (266,625) |  | $ | 2.69 |
Forfeited |  |  | (14,000) |  | $ | 2.98 |
Nonvested balance, end of year |  |  | 185,500 |  | $ | 2.85 |

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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