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Fair Value Measurements - Quantitative Information about the Inputs and Valuation Methodologies Used for Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified |  |  |  |  | 9 Months Ended
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Sep. 27, 2014 | Dec. 28, 2013 | Sep. 28, 2013 | Dec. 29, 2012 | Sep. 27, 2014 Level 3 Discounted Cash Flow | Sep. 27, 2014 Level 3 Discounted Cash Flow Minimum | Sep. 27, 2014 Level 3 Discounted Cash Flow Maximum
Quantitative information about the inputs and valuation methodologies used for fair value measurements |  |  |  |  |  |  |
Fair Value, Earn-out liability | $ 566 | $ 624 | $ 546 | $ 652 | $ 566 |  |
Valuation Technique, Earn-out liability |  |  |  |  | Discounted cash flow |  |
Weighted Average, Projected royalties |  |  |  |  | $ 1,474 | $ 414 | $ 1,715
Weighted Average, Discount rate |  |  |  |  | 21.71% | 20.50% | 27.00%

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- Definition Fair value inputs projected royalties amount. + References No definition available. + Details
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- Details
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Description of the inputs and valuation technique(s) used to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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