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Fair Value Measurements - Quantitative Information about the Inputs and Valuation Methodologies Used for Fair Value Measurements (Details) - Earn Out Liability - USD ($)
$ in Thousands
9 Months Ended
Oct. 03, 2015
Jan. 03, 2015
Quantitative information about the inputs and valuation methodologies used for fair value measurements    
Liabilities, Fair Value Measurements $ 966 $ 1,423
Level 3    
Quantitative information about the inputs and valuation methodologies used for fair value measurements    
Liabilities, Fair Value Measurements 966 $ 1,423
Level 3 | Discounted Cash Flow    
Quantitative information about the inputs and valuation methodologies used for fair value measurements    
Liabilities, Fair Value Measurements $ 966  
Valuation Technique, Earn-out liability Discounted cash flow  
Level 3 | Discounted Cash Flow | Weighted Average    
Quantitative information about the inputs and valuation methodologies used for fair value measurements    
Weighted Average, Projected royalties $ 2,934  
Weighted Average, Discount rate 11.54%  
Level 3 | Discounted Cash Flow | Minimum    
Quantitative information about the inputs and valuation methodologies used for fair value measurements    
Weighted Average, Projected royalties $ 169  
Weighted Average, Discount rate 10.35%  
Level 3 | Discounted Cash Flow | Maximum    
Quantitative information about the inputs and valuation methodologies used for fair value measurements    
Weighted Average, Projected royalties $ 3,147  
Weighted Average, Discount rate 27.00%