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Basis of Presentation and Significant Accounting Policies (Details Textual) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 03, 2015 | Jul. 03, 2015
Royalty Income [Member] |  |
Prior Period Reclassification Adjustment | $ 106,000 | $ 151,000

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- Definition The amount of a reclassification adjustment made to prior period financial statement amounts. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |