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Shareholders' Equity (Tables) | 12 Months Ended
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Dec. 29, 2012
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 2012 and 2011:
| For the fiscal year ended
| December 29, 2012 |  | December 31, 2011
Expected dividend yield | — |  |  | — |
Expected stock price volatility | 95.46 | % |  | 97.46 | %
Risk-free interest rate | 1.80 | % |  | 2.93 | %
Expected life of options (years) | 10.00 |  |  | 8.85 |
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
Balance at January 1, 2011 | 552 |  |  | $ | 3.87 |
Granted | 73 |  |  | 4.45 |
Exercised | (34 | ) |  | 3.38 |
Cancelled/expired | (3 | ) |  | 4.76 |
Balance at December 31, 2011 | 588 |  |  | 3.99 |
Granted | 38 |  |  | 4.04 |
Exercised | (29 | ) |  | 3.03 |
Cancelled/expired | (59 | ) |  | 5.25 |
Forfeited | (5 | ) |  | 4.25 |
Balance at December 29, 2012 | 533 |  |  | $ | 3.88 |
Summary of stock options outstanding and exercisable by range of excercise prices | The following table summarizes information about stock options outstanding as of December 29, 2012 (in thousands, except per share data):
Range of Exercise Prices | Options Outstanding |  | Weighted Average Remaining Contractual Life |  | Weighted Average Exercise Price |  | Aggregate Intrinsic Value
$5.05 to $6.41 | 169 |  |  | 2.57 |  | $ | 5.40 |  |  |
$3.55 to $4.69 | 191 |  |  | 6.72 |  | 4.01 |  |  |
$2.22 to $2.80 | 138 |  |  | 3.28 |  | 2.35 |  |  |
$1.87 | 35 |  |  | 5.95 |  | 1.87 |  |  |
| 533 |  |  | 4.47 |  | 3.88 |  |  | $ | — |
The following table summarizes information about stock options exercisable as of December 29, 2012 (in thousands, except per share data):
Range of Exercise Prices | Options Exercisable |  | Weighted Average Exercise Price |  | Aggregate Intrinsic Value
$5.05 to $6.41 | 169 |  |  | $ | 5.40 |  |  |
$3.55 to $4.69 | 184 |  |  | 4.01 |  |  |
$2.22 to $2.80 | 138 |  |  | 2.35 |  |  |
$1.87 | 35 |  |  | 1.87 |  |  |
| 526 |  |  | 3.88 |  |  | $ | — |

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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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + 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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