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Investments (Tables) | 12 Months Ended
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Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract] |
Components of Investments | The components of investments were as follows:
|  | Adjusted Cost Basis |  | Unrealized Gains |  | Unrealized Losses |  | Fair Value |  | Cash and Cash Equivalents |  | Marketable Securities - Current |  | Marketable Securities - Non-current |
December 31, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Changes in Fair Value Recorded in Other Comprehensive Loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset backed securities |  | $ | 111,619 |  |  | $ | 1 |  |  | $ | (68) |  |  | $ | 111,552 |  |  | $ | — |  |  | $ | 5,372 |  |  | $ | 106,180 |  |
Certificates of deposits |  | 6,002 |  |  | — |  |  | — |  |  | 6,002 |  |  | — |  |  | 6,002 |  |  | — |  |
Corporate notes and bonds |  | 207,169 |  |  | 21 |  |  | (201) |  |  | 206,990 |  |  | 3,026 |  |  | 132,688 |  |  | 71,276 |  |
Commercial paper |  | 109,391 |  |  | — |  |  | — |  |  | 109,391 |  |  | 24,193 |  |  | 85,198 |  |  | — |  |
Money market funds |  | 51,768 |  |  | — |  |  | — |  |  | 51,768 |  |  | 51,768 |  |  | — |  |  |  |
Foreign government securities |  | 8,186 |  |  | — |  |  | (5) |  |  | 8,181 |  |  | — |  |  | 3,008 |  |  | 5,173 |  |
US government securities |  | 86,783 |  |  | 4 |  |  | — |  |  | 86,787 |  |  | — |  |  | 86,787 |  |  | — |  |
Total investments |  | $ | 580,918 |  |  | $ | 26 |  |  | $ | (274) |  |  | $ | 580,671 |  |  | $ | 78,987 |  |  | $ | 319,055 |  |  | $ | 182,629 |  |
Schedule of Debt Investment Maturities | Marketable Securities Maturities
|  | Adjusted |  | Estimated |
|  | Cost Basis |  | Fair Value |
December 31, 2021 |  |  |  |  |
Due in one year or less |  | $ | 319,137 |  |  | $ | 319,053 |  |
Due after one year through five years |  | 182,793 |  |  | 182,631 |  |
Due after five years through 10 years |  | — |  |  | — |  |
Total |  | $ | 501,930 |  |  | $ | 501,684 |  |

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- Definition Tabular disclosure 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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References No definition available. + Details
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