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Marketable Securities - Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 454,765 | $ 455,004
Unrealized Gain | 0 | 3
Unrealized Loss | (9,892) | (2,132)
Marketable securities | 444,873 | 452,875
U.S. government securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 420,162 | 420,392
Unrealized Gain | 0 | 0
Unrealized Loss | (9,713) | (2,107)
Marketable securities | 410,449 | 418,285
Commercial paper |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 18,972 | 13,878
Unrealized Gain | 0 | 0
Unrealized Loss | 0 | 0
Marketable securities | 18,972 | 13,878
Asset-backed securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost |  | 2,003
Unrealized Gain |  | 0
Unrealized Loss |  | (1)
Marketable securities |  | 2,002
Corporate debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 15,631 | 18,731
Unrealized Gain | 0 | 3
Unrealized Loss | (179) | (24)
Marketable securities | $ 15,452 | $ 18,710

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
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