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Fair Value Measurements | 3 Months Ended
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Mar. 31, 2020
Fair Value Disclosures [Abstract] |
Fair Value Measurements | Fair Value Measurements The Company’s fair value measurements are classified and disclosed in one of the following three categories:
• | Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;
• | Level 2: Quoted prices in markets that are not active, or inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability;
• | Level 3: Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity).
There was no movement between Level 1 and Level 2 or between Level 2 and Level 3 from December 31, 2019 to March 31, 2020. Assets and liabilities measured at fair value are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The commercial paper, corporate notes, government securities and asset-backed securities are classified as Level 2 as they were valued based upon quoted market prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-based valuation techniques for which all significant inputs are observable in the market or can be corroborated by observable market data for substantially the full term of the assets. The following table summarizes the valuation of the Company’s financial instruments that are measured at fair value on a recurring basis:
|  | March 31, 2020 |  | December 31, 2019
|  |  |  | Fair value measurement category |  |  |  | Fair value measurement category
(In thousands) |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | 32,089 |  |  | 32,089 |  |  | — |  |  | — |  |  | 5,381 |  |  | 5,381 |  |  | — |  |  | — |
Repurchase agreements |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Commercial paper |  | 7,061 |  |  | — |  |  | 7,061 |  |  | — |  |  | 11,892 |  |  | — |  |  | 11,892 |  |  | — |
Corporate notes |  | 14,422 |  |  | — |  |  | 14,422 |  |  | — |  |  | 18,380 |  |  | — |  |  | 18,380 |  |  | — |
U.S. government securities |  | 7,889 |  |  | — |  |  | 7,889 |  |  | — |  |  | 11,295 |  |  | — |  |  | 11,295 |  |  | — |
U.S. asset-backed securities |  | 8,306 |  |  | — |  |  | 8,306 |  |  | — |  |  | 10,509 |  |  | — |  |  | 10,509 |  |  | — |
|  | 69,767 |  |  | 32,089 |  |  | 37,678 |  |  | — |  |  | 57,457 |  |  | 5,381 |  |  | 52,076 |  |  | — |
The fair values of the cash equivalents and marketable securities are based on observable market prices. See note 8 for impact of ASU 2016-13 on the investment valuation.

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- 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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