Fair Value of Financial Assets

12 Months Ended

Dec. 31, 2020

3. Fair Value of Financial Assets

The following tables present information about the Company’s financial assets measured at fair value on a recurring basis and indicate the level of the fair value hierarchy utilized to determine such fair values:

	Fair Value Measurements as of December 31, 2020:
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents:
Money market funds	$	447,146	$	—	$	—	$	447,146
Investments:
US treasury bills		—		33,026		—		33,026
US agency securities		—		197,389		—		197,389
Total investments		—		230,415		—		230,415
Total	$	447,146	$	230,415	$	—	$	677,561

	Fair Value Measurements as of December 31, 2019:
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents:
Money market funds	$	41,658	$	—	$	—	$	41,658
Investments:
US treasury bills		—		232,604		—		232,604
US agency securities		—		81,258		—		81,258
Total investments		—		313,862		—		313,862
Total	$	41,658	$	313,862	$	—	$	355,520

In determining the fair value of its investments at each date presented above, the Company relied on quoted prices for similar securities in active markets or using other inputs that are observable or can be corroborated by observable market data. The Company did not have any financial assets or liabilities during any of the periods presented in the accompanying consolidated financial statements that required Level 3 inputs.

- 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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