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Marketable Securities - Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 454,765	$ 455,004
Unrealized Gain	0	3
Unrealized Loss	(9,892)	(2,132)
Marketable securities	444,873	452,875
U.S. government securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	420,162	420,392
Unrealized Gain	0	0
Unrealized Loss	(9,713)	(2,107)
Marketable securities	410,449	418,285
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	18,972	13,878
Unrealized Gain	0	0
Unrealized Loss	0	0
Marketable securities	18,972	13,878
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		2,003
Unrealized Gain		0
Unrealized Loss		(1)
Marketable securities		2,002
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	15,631	18,731
Unrealized Gain	0	3
Unrealized Loss	(179)	(24)
Marketable securities	$ 15,452	$ 18,710

X

- 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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Amount, before tax, of unrealized loss 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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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.

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