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Fair Value Measurements | 3 Months Ended
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Mar. 31, 2024
Fair Value Disclosures [Abstract] |
Fair Value Measurements | Fair Value Measurements Authoritative guidance establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include: •Level 1 — defined as observable inputs such as quoted prices in active markets •Level 2 — defined as inputs other than quoted prices in active markets that are either directly or indirectly observable •Level 3 — defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions The Company’s assets classified in Level 1 and Level 2 as of March 31, 2024 and December 31, 2023 consist of cash equivalents and available-for-sale marketable securities. The valuation of Level 1 instruments is determined using a market approach and is based upon unadjusted quoted prices for identical assets in active markets. The valuation of Level 2 instruments is also determined using a market approach based upon quoted prices for similar assets in active markets, or other inputs that are observable for substantially the full term of the financial instrument. Level 2 securities include certificates of deposit, commercial paper and corporate notes that use as their basis readily observable market parameters. The Company held certain assets that are required to be measured at fair value on a recurring basis as of March 31, 2024, as follows:
|  |  | Fair Value Measurement as of March 31, 2024 Using
| Total Fair Value |  | Quoted Prices in Active Markets for Identical Assets |  | Significant Other Observable Inputs |  | Significant Unobservable Inputs
(in thousands) |  | (Level 1) |  | (Level 2) |  | (Level 3)
U.S. Treasury and government agencies | $ | 167,456 |  |  | $ | 167,456 |  |  | $ | — |  |  | $ | — |
Corporate debt | 139,899 |  |  | — |  |  | 139,899 |  |  | — |
Total assets measured at fair value | $ | 307,355 |  |  | $ | 167,456 |  |  | $ | 139,899 |  |  | $ | — |
The Company held certain assets that are required to be measured at fair value on a recurring basis as of December 31, 2023, as follows:
|  |  | Fair Value Measurement as of December 31, 2023 Using
| Total Fair Value |  | Quoted Prices in Active Markets for Identical Assets |  | Significant Other Observable Inputs |  | Significant Unobservable Inputs
(in thousands) |  | (Level 1) |  | (Level 2) |  | (Level 3)
U.S. Treasury and government agencies | $ | 209,103 |  |  | $ | 209,103 |  |  | $ | — |  |  | $ | — |
Corporate debt | 107,108 |  |  | — |  |  | 107,108 |  |  | — |
Total assets measured at fair value | $ | 316,211 |  |  | $ | 209,103 |  |  | $ | 107,108 |  |  | $ | — |
Total assets measured at fair value as of March 31, 2024 and December 31, 2023 include $38.4 million and $63.8 million cash equivalents, respectively. The Company also has financial assets and liabilities not required to be measured at fair value on a recurring basis, which primarily consist of cash, accounts receivable, restricted cash, accounts payable and accrued liabilities, and product revenue allowances, the carrying values of which materially approximate their fair values.

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- References No definition available. + Details
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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 -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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