Cash, Cash Equivalents and Marketable Securities - Additional Information (Details) |
9 Months Ended | |
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Sep. 30, 2021
USD ($)
item
Security
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Sep. 30, 2020
USD ($)
item
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| Investments Debt And Equity Securities [Abstract] | ||
| Realized gains (losses) | $ 0 | $ 0 |
| Number of investments adjusted for other-than-temporary declines in fair value | item | 0 | 0 |
| Number of securities held unrealized position | Security | 8 | |
| Unrealized loss position for less than twelve months | $ 23,500,000 | |
| Unrealized loss position for more than twelve months | 0 | |
| Marketable securities with an other-than temporary impairment | $ 0 | |
| X | ||||||||||
- Definition Number of investments adjusted for other-than-temporary declines in fair value. No definition available.
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| X | ||||||||||
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. No definition available.
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| X | ||||||||||
- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months. No definition available.
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| X | ||||||||||
- Definition This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities. No definition available.
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| X | ||||||||||
- Definition Number of investment positions in available-for-sale investments in a continuous unrealized loss position for less than one year or normal operating cycle, if longer, for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement. No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of unrealized and realized gain (loss) on investment in marketable security, excluding other-than-temporary impairment (OTTI). No definition available.
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