Fair value measurements - Schedule of Unrealized Loss on Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Fair value
Less than 12 months	$ 9,875	$ 0
12 months or greater	37,683	68,735
Total	47,558	68,735
Unrealized losses
Less than 12 months	(9)	0
12 months or greater	(313)	(1,759)
Total	(322)	(1,759)
U.S. government agency securities and treasuries
Fair value
Less than 12 months	9,875	0
12 months or greater	37,186	66,237
Total	47,061	66,237
Unrealized losses
Less than 12 months	(9)	0
12 months or greater	(310)	(1,733)
Total	(319)	(1,733)
Corporate bonds
Fair value
Less than 12 months	0	0
12 months or greater	497	2,498
Total	497	2,498
Unrealized losses
Less than 12 months	0	0
12 months or greater	(3)	(26)
Total	$ (3)	$ (26)