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v3.20.1

Financial Instruments (Tables) | 3 Months Ended
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Mar. 31, 2020
Investments, All Other Investments [Abstract] |
Schedule of Fair Value and Amortized Cost | The fair value and amortized cost of cash equivalents and available-for-sale securities by major security type as of March 31, 2020 and as of December 31, 2019 are presented in the following tables:
| March 31, 2020 |  |  |  |  |  |
| Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Fair Value
| (in thousands) |  |  |  |  |  |
Money market funds | $ | 113,143 |  |  | $ | — |  |  | $ | — |  |  | $ | 113,143 |
Commercial paper | 25,786 |  |  | — |  |  | — |  |  | 25,786 |
Corporate bonds | 190,625 |  |  | 505 |  |  | (276) |  |  | 190,854 |
U.S. treasury securities | 178,695 |  |  | 1,618 |  |  | — |  |  | 180,313 |
U.S. agency securities | 28,986 |  |  | 207 |  |  | (1) |  |  | 29,192 |
Total cash equivalents and investments | $ | 537,235 |  |  | $ | 2,330 |  |  | $ | (277) |  |  | $ | 539,288 |
Classified as: |  |  |  |  |  |  |
Cash equivalents |  |  |  |  |  |  | $ | 122,141 |
Short-term investments |  |  |  |  |  |  | 357,026 |
Long-term investments |  |  |  |  |  |  | 60,121 |
Total cash equivalents and investments |  |  |  |  |  |  | $ | 539,288 |
| December 31, 2019 |  |  |  |  |  |
| Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Fair Value
| (in thousands) |  |  |  |  |  |
Money market funds | $ | 122,900 |  |  | $ | — |  |  | $ | — |  |  | $ | 122,900 |
Corporate bonds | 204,144 |  |  | 871 |  |  | (4) |  |  | 205,011 |
U.S. treasury securities | 181,340 |  |  | 557 |  |  | (3) |  |  | 181,894 |
U.S. agency securities | 25,658 |  |  | 167 |  |  | (1) |  |  | 25,824 |
Certificates of deposit | 1,000 |  |  | — |  |  | — |  |  | 1,000 |
Total cash equivalents and investments | $ | 535,042 |  |  | $ | 1,595 |  |  | $ | (8) |  |  | $ | 536,629 |
Classified as: |  |  |  |  |  |  |
Cash equivalents |  |  |  |  |  |  | $ | 122,900 |
Short-term investments |  |  |  |  |  |  | 355,407 |
Long-term investments |  |  |  |  |  |  | 58,322 |
Total cash equivalents and investments |  |  |  |  |  |  | $ | 536,629 |

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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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- References No definition available. + Details
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