Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2018

Financial Assets and Liabilities Measured and Recognized at Fair Value on a Recurring Basis

As of March 31, 2018 and December 30, 2017, financial assets and liabilities measured and recognized at fair value on a recurring basis and classified under the appropriate level of the fair value hierarchy as described above were as follows:

	As of March 31, 2018								As of December 30, 2017
	Fair Value Measurements								Fair Value Measurements
(in thousands)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets:
Money market funds	$	17,761	$	—	$	—	$	17,761	$	20,950	$	—	$	—	$	20,950
Liabilities:
Earn-out liability	$	—	$	—	$	509	$	509	$	—	$	—	$	572	$	572

Quantitative Information about the Inputs and Valuation Methodologies Used for Fair Value Measurements

The following tables present quantitative information about the inputs and valuation methodologies used for our fair value measurements classified in Level 3 of the fair value hierarchy as of March 31, 2018 and December 30, 2017.

As of March 31, 2018	Fair Value (in thousands)		Valuation Technique	Significant Unobservable Input	Weighted Average (range)
Earn-out liability	$	509	Discounted cash flow	Projected royalties (in thousands)	$1,539
				Discount rate	10.41% (10.41% - 27.00%)

As of December 30, 2017	Fair Value (in thousands)		Valuation Technique	Significant Unobservable Input	Weighted Average (range)
Earn-out liability	$	572	Discounted cash flow	Projected royalties (in thousands)	$1,622
				Discount rate	10.90% (10.90% - 27.00%)

Reconciliation of the Changes in the Company's Earn-Out - Cash (Level 3 Liabilities) Balance

A reconciliation of the changes in the Company’s earn-out liability (Level 3 liability) for the three months ended March 31, 2018 and April 1, 2017 is as follows:

	Three Months Ended
(in thousands)	March 31, 2018			April 1, 2017
Balance as of beginning of the period	$	572		$	693
Payments against earn-out		(92	)		(84	)
Change in fair value of earn-out liability		29			25
Balance as of the end of the period	$	509		$	634