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Development-Stage Risks and Liquidity (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Unusual Risk or Uncertainty [Line Items]
Accumulated deficit	$ 275,242	$ 245,102
Cash, cash equivalents and marketable securities	40,400
Moderna | Moderna License Agreement
Unusual Risk or Uncertainty [Line Items]
Milestone payment	$ 2,000

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