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Stockholders' Equity (Details 5) (Restricted stock units [Member], USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 29, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Restricted stock units [Member] |  |  |
Restricted stock units outstanding, vested and expected to vest |  |  |
Restricted stock units outstanding, Number of Shares | 55,999 | 90,189 | 0
Restricted stock units outstanding, Weighted Average Remaining Contractual Life (years) | 11 months 9 days |  |
Restricted stock units outstanding, Aggregate Intrinsic Value | $ 211 |  |
Restricted stock units vested and expected to vest, Number of Shares | 48,545 |  |
Restricted stock units vested and expected to vest, Weighted Average Remaining Contractual Life (years) | 10 months 28 days |  |
Restricted stock units vested and expected to vest, Aggregate Intrinsic Value | $ 183 |  |

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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + 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)(i)-(ii) -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of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(a) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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