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Proceeds Development, Tech Transfer, Launch, And Sales Milestone Collaboration Payments

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Proceeds From Collaboration And License Agreement

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount 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. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Face amount or stated value per share of common stock.

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Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Percentage of the total number of positions eliminated as of the balance sheet date since inception of the restructuring plan(s).

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The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

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Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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Amount of reclassification from other comprehensive income (loss) to earnings, after tax, related to translation from the functional currency to reporting currency, as a result of the sale or complete or substantially complete liquidation of an investment in a foreign entity.

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Summary of Significant Accounting Policies (Details) $ / shares in Units, $ in Thousands		3 Months Ended
	May 10, 2024 USD ($) $ / shares shares	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($) segment $ / shares	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($) $ / shares
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Foreign currency transaction gain (loss)			$ (5,100)	$ 16,300
Number of business segments \| segment			1
Cash and cash equivalents			$ 480,586		$ 568,505
Net income (loss), basic			(147,600)
Net cash provided by (used in) operating activities			$ (83,555)	(325,593)
Common stock, par value per share (in usd per share) \| $ / shares			$ 0.01		$ 0.01
Restructuring and related cost, annual impact percent			85.00%
Severance and employee benefit costs			$ 4,401
Impairment of assets			$ 1,669	$ 0
Sanofi Pasteur Inc. APA \| Subsequent Events \| Private Placement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Proceeds from equity method investment	$ 68,800
Sale of stock, number of shares issued in transaction (in shares) \| shares	6,880,481
Common stock, par value per share (in usd per share) \| $ / shares	$ 0.01
Share, price per share (in usd per share) \| $ / shares	$ 10.00
Forecast \| Sanofi Pasteur Inc. APA
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Proceeds from collaboration and license agreement		$ 568,800
Collaboration agreement upfront payment amount		500,000
Forecast \| Sanofi Pasteur Inc. APA \| Licensed COVID-19 Products and Royalty Payments
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Development, tech transfer, launch, and sales milestone payments		700,000
Forecast \| Sanofi Pasteur Inc. APA \| First Four Adjuvant Products
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Development, tech transfer, launch, and sales milestone payments		200,000
Forecast \| Sanofi Pasteur Inc. APA \| Adjuvant Products Thereafter
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Development, tech transfer, launch, and sales milestone payments		$ 210,000