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Fair Value Measurements | 12 Months Ended
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Dec. 31, 2021
Fair Value Disclosures [Abstract] |
Fair Value Measurements | 3. Fair Value Measurements Fair value accounting is applied for all financial assets and liabilities that are recognized or disclosed at fair value in the financial statements on a recurring basis (at least annually). Financial instruments include cash and cash equivalents, marketable securities, accounts payable and accrued expenses that approximate fair value due to their relatively short maturities. Assets and liabilities recorded at fair value on a recurring basis in the balance sheet are categorized based upon the level of judgment associated with the inputs used to measure their fair values. Fair value is defined as the exchange price that would be received for an asset or an exit price that would be paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The authoritative guidance on fair value measurements establishes a three-tier fair value hierarchy for disclosure of fair value measurements as follows: Level 1—Inputs are unadjusted, quoted prices in active markets for identical assets or liabilities at the measurement date; Level 2—Inputs are observable, unadjusted quoted prices in active markets for similar assets or liabilities, unadjusted quoted prices for identical or similar assets or liabilities in markets that are not active or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the related assets or liabilities; and Level 3—Unobservable inputs that are significant to the measurement of the fair value of the assets or liabilities that are supported by little or no market data. To date, the Company has not recorded any impairment charges on its marketable securities due to other-than-temporary declines in market value. In determining whether a decline is other than temporary, the Company considers various factors, including the length of time and extent to which the market value has been less than amortized cost, the financial condition and near-term prospects of the issuer and the Company’s intent and ability to retain its investment in the issuer for a period of time sufficient to allow for any anticipated recovery in market value. The Company estimates the fair values of investments in corporate debt securities, commercial paper and U.S. government agency securities using valuations obtained from third-party pricing services. 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 securities, issuer credit spreads, benchmark securities, prepayment/default projections based on historical data and other observable inputs. Cash equivalents and marketable securities, all of which are classified as available-for-sale securities and measured at fair value on a recurring basis, consisted of the following (in thousands):
|  |  |  | As of December 31, 2021 |
|  | Fair Value Hierarchy Level |  | Amortized Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Fair Value |
Financial assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds— classified as cash equivalents |  | Level 1 |  | $ | 22,658 |  |  | $ | — |  |  | $ | — |  |  | $ | 22,658 |
Corporate debt |  | Level 2 |  |  | 52,704 |  |  |  | — |  |  |  | (139 | ) |  |  | 52,565 |
Asset-backed securities |  | Level 2 |  |  | 23,882 |  |  |  | — |  |  |  | (21 | ) |  |  | 23,861 |
Commercial paper |  | Level 2 |  |  | 59,532 |  |  |  | — |  |  |  | — |  |  |  | 59,532 |
U.S. government agency securities |  | Level 2 |  |  | 29,744 |  |  |  | — |  |  |  | (75 | ) |  |  | 29,669 |
Total |  |  |  | $ | 188,520 |  |  | $ | — |  |  | $ | (235 | ) |  | $ | 188,285 |
|  |  |  | As of December 31, 2020 |
|  | Fair Value Hierarchy Level |  | Amortized Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Fair Value |
Financial assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds— classified as cash equivalents |  | Level 1 |  | $ | 21,333 |  |  | $ | — |  |  | $ | — |  |  | $ | 21,333 |
Corporate debt |  | Level 2 |  |  | 32,164 |  |  |  | 48 |  |  |  | — |  |  |  | 32,212 |
Asset-backed securities |  | Level 2 |  |  | 12,367 |  |  |  | 2 |  |  |  | (1 | ) |  |  | 12,368 |
Commercial paper |  | Level 2 |  |  | 28,962 |  |  |  | — |  |  |  | — |  |  |  | 28,962 |
U.S. government agency securities |  | Level 2 |  |  | 13,047 |  |  |  | 3 |  |  |  | — |  |  |  | 13,050 |
Total |  |  |  | $ | 107,873 |  |  | $ | 53 |  |  | $ | (1 | ) |  | $ | 107,925 |
The Company does not intend to sell the securities that are in an unrealized loss position and the Company believes it is more likely than not that the investments will be held until recovery of the amortized cost bases. The Company has determined that the gross unrealized losses on marketable securities as of December 31, 2021 were temporary in nature. The following table presents the remaining contractual maturities of the Company’s marketable securities as of December 31, 2021 (in thousands):
|  | December 31, 2021 |
Due in less than one year |  | $ | 132,804 |
Due in more than one year |  |  | 55,481 |
Total |  | $ | 188,285 |

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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=123874694&loc=d3e19207-110258 + Details
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