Shareholders’ equity - Schedule of Stock Option Activity (Details)	6 Months Ended
	Jun. 30, 2024 $ / shares shares
Pre-IPO Plan
Number of Shares
Outstanding, beginning balance (in shares) | shares	30,647,575
Granted (in shares) | shares	0
Exercised (in shares) | shares	(3,070,773)
Forfeited (in shares) | shares	0
Outstanding, ending balance (in shares) | shares	27,576,802
Weighted- Average Exercise Price
Weighted- Average Exercise Price, beginning balance (USD per share) | $ / shares	$ 0.94
Weighted- Average Exercise Price, Granted (USD per share) | $ / shares	0
Weighted- Average Exercise Price, Exercised (USD per share) | $ / shares	0.46
Weighted- Average Exercise Price, Forfeited (USD per share) | $ / shares	0
Weighted- Average Exercise Price, ending balance (USD per share) | $ / shares	$ 0.99
Options exercisable (in shares) | shares	25,329,480
Weighted- Average Exercise Price, options exercisable (USD per share) | $ / shares	$ 0.92
2020 Share Option and Incentive Plan
Number of Shares
Outstanding, beginning balance (in shares) | shares	13,992,304
Granted (in shares) | shares	10,709,925
Exercised (in shares) | shares	0
Forfeited (in shares) | shares	(762,701)
Outstanding, ending balance (in shares) | shares	23,939,528
Weighted- Average Exercise Price
Weighted- Average Exercise Price, beginning balance (USD per share) | $ / shares	$ 13.82
Weighted- Average Exercise Price, Granted (USD per share) | $ / shares	5.24
Weighted- Average Exercise Price, Exercised (USD per share) | $ / shares	0
Weighted- Average Exercise Price, Forfeited (USD per share) | $ / shares	12.39
Weighted- Average Exercise Price, ending balance (USD per share) | $ / shares	$ 10.03
Options exercisable (in shares) | shares	6,970,478
Weighted- Average Exercise Price, options exercisable (USD per share) | $ / shares	$ 15.33