Fair Value Measurements (Details 1) (Level 3, Discounted Cash Flow, USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 28, 2013
Quantitative information about the inputs and valuation methodologies used for fair value measurements
Fair Value, Earn-out liability	$ 546
Valuation Technique, Earn-out liability	Discounted cash flow
Weighted Average, Projected royalties	1,408
Weighted Average, Discount rate	21.67%
Minimum
Quantitative information about the inputs and valuation methodologies used for fair value measurements
Weighted Average, Projected royalties	414
Weighted Average, Discount rate	20.40%
Maximum
Quantitative information about the inputs and valuation methodologies used for fair value measurements
Weighted Average, Projected royalties	$ 1,644
Weighted Average, Discount rate	27.00%