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Fair Value Measurements | 6 Months Ended
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Jun. 30, 2022
Fair Value Disclosures [Abstract] |
Fair Value Measurements | Fair Value Measurements The following table details the assets carried at fair value and measured on a recurring basis within the three levels of fair value as of June 30, 2022 and December 31, 2021:
(in thousands) |  |  |  | Gross Unrealized |  |  |  | Reported as:
June 30, 2022 |  | Amortized Cost |  | Gains |  | Losses |  | Fair Value |  | Cash and cash equivalents |  | Short-term investments |  | Long-term investments
Level 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mutual funds |  | $ | 1,821 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,821 |  |  | $ | 1,821 |  |  | $ | — |  |  | $ | — |
U.S. treasury securities |  | 39,405 |  |  | 18 |  |  | (246) |  |  | 39,177 |  |  | — |  |  | 14,976 |  |  | 24,201 |
Total Level 1 |  | 41,226 |  |  | 18 |  |  | (246) |  |  | 40,998 |  |  | 1,821 |  |  | 14,976 |  |  | 24,201 |
Level 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper |  | 266,695 |  |  | 2 |  |  | (207) |  |  | 266,490 |  |  | 208,533 |  |  | 57,957 |  |  | — |
Corporate debt securities |  | 7,365 |  |  | — |  |  | (135) |  |  | 7,230 |  |  | — |  |  | 7,230 |  |  | — |
Agency bonds |  | 20,378 |  |  | 19 |  |  | (219) |  |  | 20,178 |  |  | — |  |  | 8,821 |  |  | 11,357 |
Total Level 2 |  | 294,438 |  |  | 21 |  |  | (561) |  |  | 293,898 |  |  | 208,533 |  |  | 74,008 |  |  | 11,357 |
Total Level 1 and Level 2 |  | $ | 335,664 |  |  | $ | 39 |  |  | $ | (807) |  |  | $ | 334,896 |  |  | $ | 210,354 |  |  | $ | 88,984 |  |  | $ | 35,558 |
(in thousands) |  |  |  | Gross Unrealized |  |  |  | Reported as:
December 31, 2021 |  | Amortized Cost |  | Gains |  | Losses |  | Fair Value |  | Cash and cash equivalents |  | Short-term investments |  | Long-term investments
Level 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mutual funds |  | $ | 21,925 |  |  | $ | — |  |  | $ | — |  |  | $ | 21,925 |  |  | $ | 21,925 |  |  | $ | — |  |  | $ | — |
U.S. treasury securities |  | 15,156 |  |  | — |  |  | (20) |  |  | 15,136 |  |  | — |  |  | 15,136 |  |  | — |
Total Level 1 |  | 37,081 |  |  | — |  |  | (20) |  |  | 37,061 |  |  | 21,925 |  |  | 15,136 |  |  | — |
Level 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper |  | 301,906 |  |  | 2 |  |  | (90) |  |  | 301,818 |  |  | 163,694 |  |  | 138,124 |  |  | — |
Corporate debt securities |  | 14,299 |  |  | — |  |  | (36) |  |  | 14,263 |  |  | — |  |  | 6,850 |  |  | 7,413 |
Agency bonds |  | 8,998 |  |  | — |  |  | (40) |  |  | 8,958 |  |  | — |  |  | — |  |  | 8,958 |
Total Level 2 |  | 325,203 |  |  | 2 |  |  | (166) |  |  | 325,039 |  |  | 163,694 |  |  | 144,974 |  |  | 16,371 |
Total Level 1 and Level 2 |  | $ | 362,284 |  |  | $ | 2 |  |  | $ | (186) |  |  | $ | 362,100 |  |  | $ | 185,619 |  |  | $ | 160,110 |  |  | $ | 16,371 |
Contractual maturities of short-term investments as of June 30, 2022 and December 31, 2021 are due in one year or less. Contractual maturities of long-term investments as of June 30, 2022 and December 31, 2021 are due after 1 year through 2 years. There were no continuous unrealized loss positions in excess of twelve months as of June 30, 2022 and December 31, 2021.

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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