Fair Value Measurement	3 Months Ended
Fair Value Measurement	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurement	Fair Value Measurement Our cash and any investment instruments are classified within Level 1 or Level 2 of the fair value hierarchy as they are valued using quoted market prices, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency. The types of instruments valued are based on quoted market prices in active markets and are primarily U.S. government and agency securities and money market securities. Such instruments are generally classified within Level 1 of the fair value hierarchy. For financial instruments such as cash and cash equivalents, trade accounts receivables, inventory, leases payable, accounts payable and short-term debt, we consider the recorded value of the financial instruments to approximate the fair value based on the liquidity of these financial instruments. As of March 31, 2017, the carrying value of our long-term debt approximated its fair value due to the variable interest rate. We did not have any transfers in or out of Level 1 and Level 2 in the three months ended March 31, 2017 or in the year ended December 31, 2016. We did not hold any significant instruments that are measured at fair value on a recurring basis as of March 31, 2017 and December 31, 2016. For additional information related to our valuation technique and inputs used in the fair value measurement, please see Note 11.

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.