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Cash, cash equivalents and short-term investments (Tables) | 12 Months Ended
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Dec. 31, 2021
Cash And Cash Equivalents [Abstract] |
Cash, cash equivalents and short-term investments | Cash, cash equivalents and short-term investments consisted of the following as of December 31, 2021:
|  |  |  |  |  |  |  |  |  |  |  |  |  | Estimated |
(In thousands) |  | Amortized Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Fair Value |
Classified as current assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  | $ | 196,106 |  |  | $ | — |  |  | $ | — |  |  | $ | 196,106 |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market securities |  |  | 101,581 |  |  |  | — |  |  |  | — |  |  |  | 101,581 |
Total cash equivalents |  |  | 101,581 |  |  |  | — |  |  |  | — |  |  |  | 101,581 |
Total cash and cash equivalents |  |  | 297,687 |  |  |  | — |  |  |  | — |  |  |  | 297,687 |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total short-term investments |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Total cash, cash equivalents and short-term investments |  | $ | 297,687 |  |  | $ | — |  |  | $ | — |  |  | $ | 297,687 |
Cash, cash equivalents and short-term investments consisted of the following as of January 1, 2021:
|  |  |  |  |  |  |  |  |  |  |  |  |  | Estimated |
(In thousands) |  | Amortized Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Fair Value |
Classified as current assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  | $ | 146,083 |  |  | $ | — |  |  | $ | — |  |  | $ | 146,083 |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market securities |  |  | 51,442 |  |  |  | — |  |  |  | — |  |  |  | 51,442 |
Total cash equivalents |  |  | 51,442 |  |  |  | — |  |  |  | — |  |  |  | 51,442 |
Total cash and cash equivalents |  |  | 197,525 |  |  |  | — |  |  |  | — |  |  |  | 197,525 |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  |  | 44,993 |  |  |  | 8 |  |  |  | — |  |  |  | 45,001 |
Total short-term investments |  |  | 44,993 |  |  |  | 8 |  |  |  | — |  |  |  | 45,001 |
Total cash, cash equivalents and short-term investments |  | $ | 242,518 |  |  | $ | 8 |  |  | $ | — |  |  | $ | 242,526 |

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- Definition Tabular disclosure of the components of cash, cash equivalents, and investments. + References No definition available. + Details
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