Income Taxes	9 Months Ended
	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Income Taxes	Income TaxesBased on taxable income projections for 2023, the Company expects to have federal and state income tax liabilities for the year. For tax years beginning on or after January 1, 2022, the Tax Cuts and Jobs Act of 2017 (TCJA) eliminates the option to currently deduct research and development expenses and requires taxpayers to capitalize and amortize them over five years for research activities performed in the U.S. and 15 years for research activities performed outside the U.S. pursuant to Section 174 of the Internal Revenue Code (the Code). In addition, the Company is required to recognize tax revenue of $45.0 million in 2023, related to cash received under the Collaboration and License Agreement entered into with Moderna in 2022 (the Moderna License Agreement), for tax purposes in advance of GAAP recognition. The Company may have limitations on utilization of net operating losses and tax credits under TCJA and/or Sections 382 and 383 of the Code. These requirements would temporarily increase the Company’s U.S. federal and state cash tax payments and reduce cash flows in 2023.