Marketable Securities - Additional Information (Details) - Marketable Debt Securities [Member] - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Marketable Securities [Line Items]
Available-for-sale securities classified as short-term maturity	one year or less
Available-for-sale securities classified as long-term maturity	two years
Other than temporary impairment losses, investments portion in other comprehensive loss net of tax available-for sale securities		$ 0	$ 0	$ 0	$ 0