Fair Value Measurements

6 Months Ended

Jun. 30, 2020

The following tables summarize the fair value of financial assets and liabilities that are measured at fair value and the classification by level of input within the fair value hierarchy:


	FAIR VALUE MEASUREMENTS AS OF
	June 30, 2020
(in thousands)	LEVEL 1		LEVEL 2		LEVEL 3		TOTAL
Cash and cash equivalents:
Cash and cash equivalents	$	143,002	$	8,297	$	—	$	151,299




Total cash and cash equivalents:	$	143,002	$	8,297	$	—	$	151,299
Investments:

Commercial paper	$	—	$	40,028	$	—	40,028
Corporate bonds	—		50,591		—		50,591

Total investments	$	—	$	90,619	$	—	$	90,619
Total cash, cash equivalents and investments:	$	143,002	$	98,916	$	—	$	241,918


	FAIR VALUE MEASUREMENTS AS OF
	December 31, 2019
(in thousands)	LEVEL 1		LEVEL 2		LEVEL 3		TOTAL
Cash and cash equivalents:
Cash and money market funds	$	133,931	$	10,009	$	—	$	143,940



Total cash and cash equivalents:	$	133,931	$	10,009	$	—	$	143,940
Investments:

Commercial paper	$	—	$	64,622	$	—	$	64,622
Corporate bonds	—		60,564		—		60,564
U.S. Government and government agencies	—		40,064		—		40,064
Total investments	$	—	$	165,250	$	—	$	165,250
Total cash, cash equivalents and investments:	$	133,931	$	175,259	$	—	$	309,190

The fair value of the Convertible Notes, which differs from their carrying value, is influenced by interest rates, stock price and stock price volatility and is determined by prices observed in market trading. The market for trading of the Convertible Notes is not considered to be an active market and therefore the estimate of fair value is based on Level 2 inputs. The estimated fair value of the Convertible Notes was $283.6 million at June 30, 2020.

- 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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