Fair Value Measurement (Details 1) (Level 3 [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012
Quantitative information about the inputs and valuation methodologies used for fair value measurements
Fair Value, Earn-out liability	$ 652
Valuation Technique, Earn-out liability	Discounted cash flow
Discounted cash flow [Member]
Quantitative information about the inputs and valuation methodologies used for fair value measurements
Weighted Average, Projected royalties	1,762
Weighted Average, Discount rate	21.84%
Discounted cash flow [Member] | Minimum [Member]
Quantitative information about the inputs and valuation methodologies used for fair value measurements
Weighted Average, Projected royalties	631
Weighted Average, Discount rate	20.85%
Discounted cash flow [Member] | Maximum [Member]
Quantitative information about the inputs and valuation methodologies used for fair value measurements
Weighted Average, Projected royalties	$ 1,980
Weighted Average, Discount rate	27.00%