Summary of significant accounting policies - (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
Available-for-sale marketable securities
Unrealized gain on marketable securities	$ 22
Contractual maturity term	6 months
U.S. Treasury securities
Available-for-sale marketable securities
Amortized Cost	$ 39,441
Unrealized gain on marketable securities	22
Fair value	$ 39,463