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Fair Value Measurements | 6 Months Ended
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Jul. 01, 2017
Fair Value Disclosures [Abstract] |
Fair Value Measurements | Fair Value Measurements The following table presents information about our assets measured at fair value on a recurring basis as of July 1, 2017 and December 31, 2016 and indicates the fair value hierarchy of the valuation techniques we utilized to determine such fair value (in thousands):
| July 1, 2017 |  | December 31, 2016
| Fair Value Measurements Using Input Types |  |  |  | Fair Value Measurements Using Input Types |  |
| Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market mutual funds | $ | 20,084 |  |  | $ | — |  |  | $ | — |  |  | $ | 20,084 |  |  | $ | 20,014 |  |  | $ | — |  |  | $ | — |  |  | $ | 20,014 |
Certificates of deposit | $ | 15,000 |  |  | $ | — |  |  | $ | — |  |  | $ | 15,000 |  |  | $ | 15,000 |  |  | $ | — |  |  | $ | — |  |  | $ | 15,000 |
Total assets | $ | 35,084 |  |  | $ | — |  |  | $ | — |  |  | $ | 35,084 |  |  | $ | 35,014 |  |  | $ | — |  |  | $ | — |  |  | $ | 35,014 |
Non-Recurring Fair Value Measurements We re-measure the fair value of certain assets and liabilities upon the occurrence of certain events. Such assets are comprised of long-lived assets, including property and equipment, intangible assets and goodwill. In the three and six months ended July 1, 2017 and June 25, 2016, no significant remeasurements were necessary. Other financial instruments not measured or recorded at fair value in the accompanying condensed consolidated balance sheets principally consist of accounts receivable, accounts payable, and accrued liabilities. The estimated fair values of these instruments approximate their carrying values due to their short-term nature.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -URI http://asc.fasb.org/topic&trid=2155941 + Details
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