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Fair Value of Financial Instruments (Details) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Level 1 | Fair value, recurring
Assets, Fair Value Disclosure [Abstract]
Financial assets held in marketable securities	$ 96,400,000	$ 273,800,000
Level 2
Assets, Fair Value Disclosure [Abstract]
Assets classified as level 2 or level 3, fair value	0
Liabilities classified as level 2 or level 3, fair value		0
Level 3
Assets, Fair Value Disclosure [Abstract]
Assets classified as level 2 or level 3, fair value		0
Liabilities classified as level 2 or level 3, fair value	0
Money market funds | Level 1 | Fair value, recurring
Assets, Fair Value Disclosure [Abstract]
Financial assets held in money market accounts	$ 167,200,000	$ 35,200,000

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Fair value portion of asset recognized for present right to economic benefit.

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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).

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair value of financial and nonfinancial obligations.

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