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Summary of Significant Accounting Policies (Details 1) (USD $) In Thousands, unless otherwise specified | 9 Months Ended
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Sep. 28, 2013 | Sep. 29, 2012
Reconciliation of the changes in the Company's deferred revenue balance |  |  |
Balance, beginning of period | $ 1,004 | [1] | $ 1,014
Additions to deferral | 985 |  | 680
Revenue recognized | (927) |  | (833)
Balance, end of period | $ 1,062 |  | $ 861
[1] | Derived from the audited consolidated financial statements included in the annual report filed on Form 10-K with the SEC for the year ended December 29, 2012.

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- Definition Amount of deferred revenue recognized for transactions arising during the current reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an Entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1) -URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A + Details
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