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Shareholders' Equity (Tables) | 12 Months Ended
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Jan. 03, 2015
Stockholders' Equity Note [Abstract] |
Summary of the assumptions used to estimate the fair value of stock options granted using the Black-Scholes Model | The fair value of each option grant is estimated on the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions for fiscal years 2014 and 2013:
| For the fiscal years ended
| January 3, 2015 |  | December 28, 2013
Expected dividend yield | — |  |  | — |
Expected stock price volatility | 83.82 | % |  | 90.50 | %
Risk-free interest rate | 2.16 | % |  | 1.47 | %
Expected life of options (years) | 7.55 |  |  | 7.29 |
Schedule of all outstanding options, activity [Table Text Block] | Additional information relating to all outstanding options is as follows (in thousands, except per share data):
| Options Outstanding |  | Weighted Average Exercise Price |  | Aggregate Intrinsic Value |  | Weighted Average Remaining Contractual Life
Balance at December 29, 2012 | 533 |  |  | $ | 3.88 |  |  |  |  |
Granted | 315 |  |  | 2.13 |  |  |  |  |
Exercised | (15 | ) |  | 2.38 |  |  |  |  |
Cancelled/expired | (67 | ) |  | 3.11 |  |  |  |  |
Balance at December 28, 2013 | 766 |  |  | 3.26 |  |  | $ | 326 |  |  | 4.99
Granted | 219 |  |  | 3.04 |  |  |  |  |
Exercised | (10 | ) |  | 2.38 |  |  |  |  |
Forfeited | (70 | ) |  | 2.73 |  |  |  |  |
Balance at January 3, 2015 | 905 |  |  | $ | 3.25 |  |  | $ | 212 |  |  | 4.56
Options exercisable at January 3, 2015 | $ | 635 |  |  | $ | 3.50 |  |  | $ | 170 |  |  |
Summary of stock options outstanding and exercisable by range of excercise prices |
Schedule of estimated future share-based compensation expense | Based on the value of options outstanding as of January 3, 2015, estimated future share-based compensation expense is as follows:
Fiscal year 2015 | $ | 193 |
Fiscal year 2016 | 139 |
Fiscal year 2017 | 43 |
| $ | 375 |

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- Definition Tabular disclosure of the changes in other outstanding share-based compensation awards other than stock options or nonvested awards. + 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 option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + 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 stock options, including, but not limited to: (a) expected term of share options and similar instruments, (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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