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License Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
License revenue	$ 0	$ 0	$ 3,600	$ 0
Lexeo Therapeutics, Inc
Disaggregation of Revenue [Line Items]
License revenue			$ 3,500

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