Marketable Securities and Fair Value Measurements - Additional Information (Detail) - USD ($) |
6 Months Ended | |
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Jun. 30, 2021 |
Jun. 30, 2020 |
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Investments Debt And Equity Securities [Abstract] | ||
Proceeds from sale of available-for-sale securities | $ 0 | $ 0 |
Available-for-sale securities, realized gain | $ 0 | $ 0 |
X | ||||||||||
- Definition This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. No definition available.
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X | ||||||||||
- References No definition available.
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X | ||||||||||
- Definition Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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