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Financial Instruments - Summary of Investments (Details) - U.S. Treasury bills - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 318,419	$ 416,559
Unrealized Gains	0	0
Unrealized Losses	(373)	(50)
Fair Value	$ 318,047	$ 416,509

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- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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