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Cash, Cash Equivalents and Short-Term Investments - Available-for-sale Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Amortized Cost	$ 410,390	$ 383,547
Unrealized Gains	1,248	12
Unrealized Losses	(24,687)	(3,867)
Fair Value	386,951	379,692
US Treasury Notes Securities
Amortized Cost	199,626	226,020
Unrealized Gains	5	12
Unrealized Losses	(8,913)	(2,136)
Fair Value	190,718	223,896
Corporate Debt Securities
Amortized Cost	210,764	157,527
Unrealized Gains	1,243
Unrealized Losses	(15,774)	(1,731)
Fair Value	$ 196,233	$ 155,796

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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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