Stock-based compensation - Compensation expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Stock-based compensation
Stock-based compensation	$ 3,460	$ 3,434	$ 11,266	$ 11,048
Research and development
Stock-based compensation
Stock-based compensation	1,526	1,590	4,640	4,495
General and administrative
Stock-based compensation
Stock-based compensation	$ 1,934	$ 1,844	$ 6,626	$ 6,553

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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+ Details

Voyager Therapeutics, Inc. 10-Q