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Income Taxes (Details Textual) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 28, 2013 | Dec. 29, 2012 | Dec. 31, 2011 | Jan. 01, 2011
Income Taxes (Additional Textual) [Abstract] |  |  |  |
Payments of interest related to unrecognized tax benefits | $ 67,000 |  |  |
Ending balance of unrecognized tax benefits | 1,027,000 | 954,000 | 1,191,000 | 865,000
Unrecognized tax benefits recognition impact on income tax rate | 0 |  |  |
Unrecognized tax benefits in which no material change is expected | 1,000,000 |  |  |
Decrease in valuation allowance | 87,000 | 1,600,000 | 414,000 |
Federal |  |  |  |
Income Taxes (Textual) [Abstract] |  |  |  |
Net operating loss | 13,900,000 |  |  |
Stock option deduction | 600,000 |  |  |
Net operating loss expiration year | 2032 |  |  |
R&D Credits | 1,200,000 |  |  |
Tax credit carryforward expiration year | 2026 |  |  |
State |  |  |  |
Income Taxes (Textual) [Abstract] |  |  |  |
Net operating loss | 14,100,000 |  |  |
Stock option deduction | 400,000 |  |  |
Net operating loss expiration year | 2020 |  |  |
R&D Credits | $ 1,700,000 |  |  |

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- Definition Unrecognized tax benefits in which no material changes anticipated. + References No definition available. + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
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- Definition The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Carryforwards -URI http://asc.fasb.org/extlink&oid=6506874 + Details
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- Definition Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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- Definition Amount of interest expense accrued for an underpayment of income taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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