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Fair Value (Tables) | 6 Months Ended
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Jun. 30, 2021
Fair Value Disclosures [Abstract] |
Summary of the Company's Assets and Liabilities Measured at Fair Value on a Recurring Basis | The following table presents information about the Company’s assets and liabilities at June 30, 2021 and December 31, 2020 that are measured at fair value on a recurring basis and indicates the fair value hierarchy of the valuation techniques the Company utilized to determine such fair value:
|  | June 30, |  |  |  |  |  |  |  |  |  |  |  |  |
(In thousands) |  | 2021 |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  | $ | 1,872 |  |  | $ | 1,872 |  |  | $ | — |  |  | $ | — |
U.S. government and agency debt securities |  |  | 113,796 |  |  |  | 76,337 |  |  |  | 37,459 |  |  |  | — |
Corporate debt securities |  |  | 189,550 |  |  |  | — |  |  |  | 189,550 |  |  |  | — |
International government agency debt securities |  |  | 103,998 |  |  |  | — |  |  |  | 103,998 |  |  |  | — |
Contingent consideration |  |  | 29,061 |  |  |  | — |  |  |  | — |  |  |  | 29,061 |
Total |  | $ | 438,277 |  |  | $ | 78,209 |  |  | $ | 331,007 |  |  | $ | 29,061 |
|  | December 31, |  |  |  |  |  |  |  |  |  |  |  |  |
|  | 2020 |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents |  | $ | 41,849 |  |  | $ | 41,849 |  |  | $ | — |  |  | $ | — |
U.S. government and agency debt securities |  |  | 103,345 |  |  |  | 73,451 |  |  |  | 29,894 |  |  |  | — |
Corporate debt securities |  |  | 184,956 |  |  |  | — |  |  |  | 183,979 |  |  |  | 977 |
International government agency debt securities |  |  | 94,871 |  |  |  | — |  |  |  | 94,871 |  |  |  | — |
Contingent consideration |  |  | 32,451 |  |  |  | — |  |  |  | — |  |  |  | 32,451 |
Total |  | $ | 457,472 |  |  | $ | 115,300 |  |  | $ | 308,744 |  |  | $ | 33,428 |
Rollforward of the Fair Value of the Assets Determined using Level 3 Inputs | The following table is a rollforward of the fair value of the Company’s assets whose fair values were determined using Level 3 inputs at June 30, 2021:
(In thousands) |  | Fair Value |
Balance, January 1, 2021 |  | $ | 33,428 |
Change in the fair value of contingent consideration |  |  | 4,518 |
Milestone and royalty payments received by the Company related to contingent consideration |  |  | (7,889 | )
Impairment of corporate debt security |  |  | (977 | )
Royalty payments due to the Company related to contingent consideration |  |  | (19 | )
Balance, June 30, 2021 |  | $ | 29,061 |

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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