Fair Value Measurements

6 Months Ended

Jun. 30, 2021

3. Fair Value Measurements

The Company measures the following financial assets at fair value on a recurring basis. The fair value of these assets was determined as follows (in thousands):

	Balance at June 30, 2021		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash equivalents:
Money market mutual funds	$	35,231	$	35,231	$	—	$	—
Total cash equivalents	$	35,231	$	35,231	$	—	$	—
Available-for-sale securities:
Commercial paper	$	66,280	$	—	$	66,280	$	—
Corporate debt securities		39,579		—		39,579		—
US Treasury securities		7,006		—		7,006		—
Agency bonds		5,212		—		5,212		—
Total available-for-sale securities	$	118,077	$	—	$	118,077	$	—
Available-for-sale securities, long-term:
US Treasury securities	$	18,881	$	—	$	18,881	$	—
Agency bonds		9,952				9,952
Total available-for-sale securities, long-term	$	28,833	$	—	$	28,833	$	—

	Balance at December 31, 2020		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash equivalents:
Money market mutual funds	$	7,962	$	7,962	$	—	$	—
Corporate debt securities		4,001		—		4,001		—
Commercial paper		12,499		—		12,499		—
Total cash equivalents	$	24,462	$	7,962	$	16,500	$	—
Available-for-sale securities:
Commercial paper	$	19,481	$	—	$	19,481	$	—
Corporate debt securities		1,286		—		1,286		—
US Treasury securities		3,027		—		3,027		—
Certificates of deposit		2,774		—		2,774		—
Total available-for-sale securities	$	26,568	$	—	$	26,568	$	—

Money market funds were valued by the Company using quoted prices in active markets for identical securities, which represent a Level 1 measurement within the fair value hierarchy. During the three and six months ended June 30, 2021 and the year ended December 31, 2020 there were no transfers between Level 1, Level 2 and Level 3.

- 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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