Fair Value Measurements

9 Months Ended

Sep. 30, 2021

4.	Fair Value Measurements

The fair values of the Company’s financial assets that are measured on a recurring basis are as follows (in thousands):

	September 30, 2021
	Level 1		Level 2		Level 3		Total
Money market funds	$	171,628	$	—	$	—	$	171,628
Corporate bonds		—		126,994		—		126,994
Commercial paper		—		107,402		—		107,402
U.S. government bonds		73,108		—		—		73,108
Agency bonds		—		23,399		—		23,399
Asset-backed securities		—		27,256		—		27,256
Foreign government bonds		—		8,127		—		8,127
Equity investments		225		—		—		225
Total	$	244,961	$	293,178	$	—	$	538,139

	December 31, 2020
	Level 1		Level 2		Level 3		Total
Bond and mutual funds	$	—	$	8,144	$	—	$	8,144
Equity investments		244		—		—		244
Money market funds		590,347		—		—		590,347
Total	$	590,591	$	8,144	$	—	$	598,735

The Company’s Level 2 investments are valued using third-party pricing sources. The pricing services utilize industry standard valuation models, including both income and market-based approaches, for which all significant inputs are observable, either directly or indirectly, to estimate fair value. These inputs include reported trades of and broker/dealer quotes on the same or similar investments, issuer credit spreads, benchmark investments, prepayment/default projections based on historical data and other observable inputs. There were no transfers of assets between levels during the three and nine months ended September 30, 2021.

The Company’s financial liabilities related to lease obligations as of September 30, 2021 and December 31, 2020 were immaterial.

- 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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