Fair Value Measurements

9 Months Ended

Sep. 30, 2018

The Company categorizes its assets measured at fair value into a fair value hierarchy based on the inputs used to price the asset. The three levels of the fair value hierarchy are:

Level 1 — Quoted prices in active markets for identical assets or liabilities

Level 2 — Quoted prices for similar assets and liabilities in active markets or inputs that are observable

Level 3 — Inputs that are unobservable (for example, cash flow modeling inputs based on assumptions)

The Company has no liabilities that are measured at fair value on a recurring basis. The following table presents the Company’s assets that are measured at fair value on a recurring basis.

Cash and cash equivalents and investments as of September 30, 2018 and December 31, 2017 consisted of the following (in thousands):



	September 30, 2018		December 31, 2017
Cash and cash equivalents
Cash	$	65,707	$	49,452
Money market funds	57,333		56,640
Total cash and cash equivalents	123,040		106,092
Short-term investments
Short-term investments	38		51
Long-term investments
Long-term restricted investments	1,181		1,181
Total cash and cash equivalents and investments	$	124,259	$	107,324

As of September 30, 2018 and December 31, 2017, the Company’s cash, cash equivalents, and investments were all measured at fair value using Level 1 inputs. Short-term investments were included in “Prepaid expenses and other current assets” on the Condensed Consolidated Balance Sheets as of September 30, 2018 and December 31, 2017. During the three and nine months ended September 30, 2018, there were no transfers in or out of the Company’s Level 1 assets.

Long-term restricted investments consists of a $1.2 million letter of credit pursuant to the Company's New York office lease agreement, which is collateralized by U.S. Treasury bills that are restricted with respect to withdrawal or use.

- 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.

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