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Marketable Securities - Schedule of Fair Value and Amortized Cost of Marketable Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Marketable Securities [Line Items] |  |
Amortized Cost | $ 640,885 | $ 251,424
Unrealized Gains | 5 | 387
Unrealized Losses | (805) | (55)
Fair Value | 640,085 | 251,756
U.S. agency obligations [Member] |  |
Marketable Securities [Line Items] |  |
Amortized Cost | 54,122 | 32,520
Unrealized Gains | 0 | 0
Unrealized Losses | (115) | (10)
Fair Value | 54,007 | 32,510
U.S. treasury securities [Member] |  |
Marketable Securities [Line Items] |  |
Amortized Cost | 446,878 |
Unrealized Gains | 0 |
Unrealized Losses | (443) |
Fair Value | 446,435 |
Municipal bonds [Member] |  |
Marketable Securities [Line Items] |  |
Amortized Cost | 3,045 |
Unrealized Gains | 0 |
Unrealized Losses | (1) |
Fair Value | 3,044 |
Corporate notes and bonds [Member] |  |
Marketable Securities [Line Items] |  |
Amortized Cost | 125,845 | 155,401
Unrealized Gains | 5 | 360
Unrealized Losses | (246) | (21)
Fair Value | 125,604 | 155,740
Commercial paper [Member] |  |
Marketable Securities [Line Items] |  |
Amortized Cost | 10,995 | 63,503
Unrealized Gains | 0 | 27
Unrealized Losses | 0 | (24)
Fair Value | $ 10,995 | $ 63,506

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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 http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 + Details
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