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Investments - Components of Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost Basis	$ 319,087	$ 504,905
Unrealized Gains	0	32
Unrealized Losses	(172)	(1,595)
Fair Value	318,915	503,342
Cash and Cash Equivalents	285,499	319,346
Marketable Securities - Current	27,319	127,268
Marketable Securities - Non-current	6,097	56,728
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost Basis	6,186	58,455
Unrealized Gains	0	1
Unrealized Losses	(50)	(264)
Fair Value	6,136	58,192
Cash and Cash Equivalents	0	0
Marketable Securities - Current	39	1,464
Marketable Securities - Non-current	6,097	56,728
Corporate notes and bonds
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost Basis	27,402	111,592
Unrealized Gains	0	0
Unrealized Losses	(122)	(1,294)
Fair Value	27,280	110,298
Cash and Cash Equivalents	0	0
Marketable Securities - Current	27,280	110,298
Marketable Securities - Non-current	0	0
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost Basis		10,477
Unrealized Gains		2
Unrealized Losses		0
Fair Value		10,479
Cash and Cash Equivalents		0
Marketable Securities - Current		10,479
Marketable Securities - Non-current		0
Money market funds
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost Basis	285,499	232,448
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	285,499	232,448
Cash and Cash Equivalents	285,499	232,448
Marketable Securities - Current	0	0
Marketable Securities - Non-current	$ 0
Foreign government securities
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost Basis		5,064
Unrealized Gains		0
Unrealized Losses		(37)
Fair Value		5,027
Cash and Cash Equivalents		0
Marketable Securities - Current		5,027
Marketable Securities - Non-current		0
US government and agency securities
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost Basis		86,869
Unrealized Gains		29
Unrealized Losses		0
Fair Value		86,898
Cash and Cash Equivalents		86,898
Marketable Securities - Current		0
Marketable Securities - Non-current		$ 0

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