Marketable securities - Summary of marketable securities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Marketable securities, current:
Fair Value	$ 155,598	$ 246,399
Marketable securities, non-current:
Fair Value	29,857	60,962
Amortized Cost	186,359	311,498
Gross Unrealized Gains	7	4
Gross Unrealized Losses	(911)	(4,141)
Fair Value	185,455	307,361
Corporate debt securities
Marketable securities, current:
Amortized Cost	105,508	183,270
Gross Unrealized Gains	7	2
Gross Unrealized Losses	(503)	(2,068)
Fair Value	105,012	181,204
Marketable securities, non-current:
Amortized Cost	22,112	53,592
Gross Unrealized Gains	0	2
Gross Unrealized Losses	(128)	(471)
Fair Value	21,984	53,123
U.S. government debt securities
Marketable securities, current:
Amortized Cost	40,898	40,986
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(223)	(1,184)
Fair Value	40,675	39,802
Marketable securities, non-current:
Amortized Cost	7,927	8,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(54)	(161)
Fair Value	7,873	7,839
U.S. Treasury securities
Marketable securities, current:
Amortized Cost	9,914	25,650
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(3)	(257)
Fair Value	$ 9,911	$ 25,393