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Income Taxes (Detail and Activity of The ASC 740-10 Liability) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 29, 2017 | Dec. 30, 2016
Income Tax Disclosure [Abstract] |  |
Unrecognized Tax Benefits, Beginning Balance | $ 738 | $ 712
Additions based on tax positions | 28 | 26
Unrecognized Tax Benefits, Ending balance | $ 766 | $ 738

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- Definition Amount of unrecognized tax benefits. + 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 (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. + 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 (a)(2) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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