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Cash Equivalents and Marketable Securities (Details) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2022 USD ($) security item | Sep. 30, 2021 USD ($) | Dec. 31, 2021 USD ($)
Cash Equivalents and Marketable Securities |  |  |
Amortized Cost | $ 482,752 |  | $ 620,409
Gross Unrealized Gains | 11 |  | 2
Gross Unrealized Losses | (4,302) |  | (495)
Fair Value | $ 478,461 |  | 619,916
Number of securities in an unrealized loss position for more than 12 months | item | 3 |  |
Number of noncurrent securities | security | 25 |  |
Noncurrent marketable securities | $ 58,844 |  | 120,071
Realized gains (losses) on available-for-sale securities | $ 0 | $ 0 |
Minimum |  |  |
Cash Equivalents and Marketable Securities |  |  |
Remaining maturity term | 1 year |  |
Maximum |  |  |
Cash Equivalents and Marketable Securities |  |  |
Remaining maturity term | 2 years |  |
Money market funds |  |  |
Cash Equivalents and Marketable Securities |  |  |
Amortized Cost | $ 210,705 |  | 203,519
Fair Value | 210,705 |  | 203,519
Government agency securities. |  |  |
Cash Equivalents and Marketable Securities |  |  |
Amortized Cost | 126,455 |  | 126,927
Gross Unrealized Gains | 2 |  |
Gross Unrealized Losses | (2,911) |  | (228)
Fair Value | 123,546 |  | 126,699
U.S. Treasuries |  |  |
Cash Equivalents and Marketable Securities |  |  |
Amortized Cost | 68,568 |  | 124,016
Gross Unrealized Gains | 9 |  | 1
Gross Unrealized Losses | (425) |  | (84)
Fair Value | 68,152 |  | 123,933
Commercial paper |  |  |
Cash Equivalents and Marketable Securities |  |  |
Amortized Cost | 42,134 |  | 89,699
Gross Unrealized Gains |  |  | 1
Gross Unrealized Losses | (100) |  | (13)
Fair Value | 42,034 |  | 89,687
Corporate notes/bonds |  |  |
Cash Equivalents and Marketable Securities |  |  |
Amortized Cost | 34,890 |  | 76,248
Gross Unrealized Losses | (866) |  | (170)
Fair Value | $ 34,024 |  | $ 76,078

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