Fair Value Measurement (Tables)

3 Months Ended

Mar. 30, 2013

Fair Value Measurement [Abstract]

Financial assets and liabilities measured and recognized at fair value on a recurring basis

	March 30, 2013							December 29, 2012
	Fair Value Measurements							Fair Value Measurements
	Level 1		Level 2	Level 3		Total		Level 1		Level 2	Level 3		Total
Assets:
Money market funds	$	10,839				$	10,839	$	10,839				$	10,839
Liabilities:
Earn-out liability				$	588	$	588				$	652	$	652

Quantitative information about the inputs and valuation methodologies used for fair value measurements

As of March 30, 2013	Fair Value (in thousands)	Valuation Technique	Significant Unobservable Input	Weighted Average (range)
Earn-out liability	$588	Discounted cash flow	Projected royalties (in thousands)	$1,662 (414 – 1,934)
			Discount rate	21.99% (20.91% - 27.00%)

Reconciliation of the changes in the Company's earn-out - cash (Level 3 liabilities) balance

	Three Months Ended
	March 30, 2013			March 31, 2012
Balance at the beginning of the period	$	652		$	765
Payments against earn-out		(83	)		(86	)
Change in fair value of earn-out liability		19			29
Balance at the end of the period	$	588		$	708