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Marketable Securities - Summary of Investments (Details) $ in Thousands	Dec. 31, 2021 USD ($) security	Dec. 31, 2020 USD ($) security
Marketable securities available-for-sale
Amortization Cost	$ 40,194	$ 180,675
Gross Unrealized Gains		7
Gross Unrealized Losses	(35)	(9)
Estimated Fair Value	40,159	180,673
Aggregate fair value of marketable securities with unrealized gains (losses) position for less than a year	$ 30,200	$ 45,700
Number of investments in an unrealized loss position for less than a year | security	3	5
U.S. Treasury obligations
Marketable securities available-for-sale
Amortization Cost	$ 40,194	$ 180,675
Gross Unrealized Gains		7
Gross Unrealized Losses	(35)	(9)
Estimated Fair Value	$ 40,159	$ 180,673

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