Fair Value of Financial Instruments

6 Months Ended

Jun. 30, 2014

3. Fair Value of Financial Instruments

The carrying value of the Company’s financial instruments, including cash equivalents, restricted cash, accounts receivable, and accounts payable, approximate their fair values due to their short maturities. The Company’s financial assets and liabilities are measured using inputs from the three levels of the fair value hierarchy. A financial asset or liability’s classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. The three levels are as follows:

Level 1: Unadjusted quoted prices for identical assets or liabilities in active markets accessible by the Company at the measurement date.

Level 2: Inputs include quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability, and inputs that are derived principally from or corroborated by observable market data by correlation or other means.

Level 3: Unobservable inputs that reflect the Company’s assumptions about the assumptions that market participants would use in pricing the asset or liability.

The following table summarizes the basis used to measure certain of the Company’s financial assets that are carried at fair value (in thousands):


	Basis of Fair Value Measurements
	Balance		Quoted Prices in Active Markets for Identical Items (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Balance at December 31, 2013
Cash equivalents — money market funds	$	28,210	$	28,210	$	—	$	—
Cash equivalents — bank deposits		5,001		—		5,001		—
Short-term marketable securities — U.S. government agency securities		100,299		75,288		25,011		—
Balance at June 30, 2014
Cash equivalents - money market funds		27,504		27,504		—		—
Cash equivalents - bank deposits		5,021		—		5,021		—
Short-term marketable securities - U.S. government agency securities		100,170		95,168		5,002		—

Bank deposits and certain U.S. government agency securities are classified within the second level of the fair value hierarchy as the fair value of those assets are determined based upon quoted prices for similar assets.

- 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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