Fair value measurements (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Assets, Fair Value Disclosure [Abstract]
Marketable securities	$ 103,744	$ 34,523
U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Marketable securities	103,744	29,548
U.S. government agency securities
Assets, Fair Value Disclosure [Abstract]
Marketable securities		4,975
Recurring basis
Assets, Fair Value Disclosure [Abstract]
Cash equivalents		115,538
Marketable securities		34,523
Recurring basis | Money market funds
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	34,586	90,649
Recurring basis | U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Cash equivalents		24,889
Marketable securities	103,744	29,548
Recurring basis | U.S. government agency securities
Assets, Fair Value Disclosure [Abstract]
Marketable securities		4,975
Recurring basis | Quoted Prices in Active Markets (Level 1)
Assets, Fair Value Disclosure [Abstract]
Cash equivalents		115,538
Marketable securities		29,548
Recurring basis | Quoted Prices in Active Markets (Level 1) | Money market funds
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	34,586	90,649
Recurring basis | Quoted Prices in Active Markets (Level 1) | U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Cash equivalents		24,889
Marketable securities	103,744	29,548
Recurring basis | Quoted Prices in Active Markets (Level 1) | U.S. government agency securities
Assets, Fair Value Disclosure [Abstract]
Marketable securities		0
Recurring basis | Significant Other Observable Inputs (Level 2)
Assets, Fair Value Disclosure [Abstract]
Cash equivalents		0
Marketable securities		4,975
Recurring basis | Significant Other Observable Inputs (Level 2) | Money market funds
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0	0
Recurring basis | Significant Other Observable Inputs (Level 2) | U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Cash equivalents		0
Marketable securities	0	0
Recurring basis | Significant Other Observable Inputs (Level 2) | U.S. government agency securities
Assets, Fair Value Disclosure [Abstract]
Marketable securities		4,975
Recurring basis | Significant Unobservable Inputs (Level 3)
Assets, Fair Value Disclosure [Abstract]
Cash equivalents		0
Marketable securities		0
Recurring basis | Significant Unobservable Inputs (Level 3) | Money market funds
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | U.S. treasury securities
Assets, Fair Value Disclosure [Abstract]
Cash equivalents		0
Marketable securities	$ 0	0
Recurring basis | Significant Unobservable Inputs (Level 3) | U.S. government agency securities
Assets, Fair Value Disclosure [Abstract]
Marketable securities		$ 0