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Goodwill and Intangible Assets Finite-Lived Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified | Apr. 04, 2015 | Jan. 03, 2015
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Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets | $ 7,745 us-gaap_FiniteLivedIntangibleAssetsGross | $ 7,745 us-gaap_FiniteLivedIntangibleAssetsGross
Finite-Lived Intangible Assets, Accumulated Amortization | 2,327 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization | 2,118 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Developed technologies [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets | 5,231 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_PatentsMember | 5,231 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_PatentsMember
Finite-Lived Intangible Assets, Accumulated Amortization | 1,465 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_PatentsMember | 1,342 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_PatentsMember
Customer Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets | 2,413 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerListsMember | 2,413 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerListsMember
Finite-Lived Intangible Assets, Accumulated Amortization | 761 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerListsMember | 675 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerListsMember
Trademarks and Trade Names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-Lived Intangible Assets | 101 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksAndTradeNamesMember | 101 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksAndTradeNamesMember
Finite-Lived Intangible Assets, Accumulated Amortization | $ 101 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksAndTradeNamesMember | $ 101 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksAndTradeNamesMember

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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