Marketable Securities - Additional Information (Details) - Marketable Debt Securities [Member] - USD ($) |
3 Months Ended | 9 Months Ended | |||
---|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
Dec. 31, 2020 |
|
Debt Securities, Available-for-sale [Line Items] | |||||
Impairments to marketable securities or reserves for credit losses | $ 0 | $ 0 | $ 0 | $ 0 | |
Marketable securities, Accrued interest | 100,000 | 100,000 | $ 100,000 | ||
U.S. Government Agency Bonds [Member] | |||||
Debt Securities, Available-for-sale [Line Items] | |||||
Debt securities considered to be an unrealized loss position | $ 0 | ||||
U.S. Government Agency Bonds [Member] | Maximum [Member] | |||||
Debt Securities, Available-for-sale [Line Items] | |||||
Debt securities considered to be an unrealized loss position | $ 100,000 | $ 100,000 |