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Stock-based awards - Textual (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 18, 2019	Jun. 30, 2019	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Jan. 31, 2024	Dec. 31, 2023	Jan. 31, 2023
Share-based awards
Number of shares remained available for grant			25,113,641		25,113,641			13,667,341
Weighted average grant-date fair value per share of stock options granted			$ 15.53	$ 48.4	$ 16.45	$ 47.78
Stock options granted ( in shares)					934,225
Exercise price					$ 22.21
Stock compensation expense			$ 7,656	$ 4,798	$ 15,054	$ 9,642
Total unrecognized compensation cost related to unvested stock-based awards			53,565		$ 53,565
Weighted average period of recognition for unrecognized compensation cost					2 years 8 months 12 days
Total unrecognized compensation cost related to RSU			$ 13,851		$ 13,851
Restricted Stock Units
Share-based awards
Weighted average grant date fair value per share granted				$ 49.49	$ 23.48	$ 49.49
Weighted average period of recognition for unrecognized compensation cost					3 years 3 months 14 days
RSU granted (shares)			0		245,413
2018 Stock option and grant plan
Share-based awards
Number of shares of common stock issued	3,071,960
Number of shares remained available for grant	107,635		980,868		980,868			1,114,189
2019 Stock option and incentive plan
Share-based awards
Number of shares remained available for grant	107,635
Number of shares initially reserved for issuance		2,572,457
Number of additional shares reserved for issuance							2,230,177		1,874,608
Percent of shares reserved and available for issuance automatically increase annually on January 1		4.00%
Percentage of exercise price per share of stock options		100.00%
Percentage of minimum exercise price, holding more than 10% of voting power		110.00%
Stock options vesting period		4 years
2019 Employee stock purchase plan
Share-based awards
Number of shares initially reserved for issuance	273,869
Number of additional shares reserved for issuance							410,803		410,803
Percent of shares reserved and available for issuance automatically increase annually on January 1		1.00%
Number of shares reserved and available for issuance automatically increase annually on January 1 (in shares)		410,803
Maximum \| 2019 Stock option and incentive plan
Share-based awards
Term of stock option		10 years