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Cash, Cash Equivalents and Short-Term Investments - Company's gross unrealized losses and fair value (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Cash and Cash Equivalents |  |  |
Less than 12 Months, Fair Value | $ 80,958 |  |
12 Months or more, Fair Value | 305,992 |  |
Total, Fair Value | 386,951 |  |
Less than 12 Months, Unrealized Losses | (2,515) |  |
12 Months or more, Unrealized Losses | (22,172) |  |
Total, Unrealized Losses | (24,687) |  |
Realized losses (gains) on available-for-sale investments | (100) | $ (80) | $ 30
US Treasury Notes Securities |  |  |
Cash and Cash Equivalents |  |  |
Less than 12 Months, Fair Value | 19,466 |  |
12 Months or more, Fair Value | 171,252 |  |
Total, Fair Value | 190,718 |  |
Less than 12 Months, Unrealized Losses | (297) |  |
12 Months or more, Unrealized Losses | (8,616) |  |
Total, Unrealized Losses | (8,913) |  |
Corporate Debt Securities |  |  |
Cash and Cash Equivalents |  |  |
Less than 12 Months, Fair Value | 61,492 |  |
12 Months or more, Fair Value | 134,740 |  |
Total, Fair Value | 196,233 |  |
Less than 12 Months, Unrealized Losses | (2,218) |  |
12 Months or more, Unrealized Losses | (13,556) |  |
Total, Unrealized Losses | $ (15,774) |  |

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- Definition It represents the amount of aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer. + References No definition available. + Details
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