Related party transactions (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Related party transactions
Royalties earned			$ 0
Royalties paid			0
General and administrative	$ 14,788,000	$ 11,824,000	29,276,000	$ 28,783,000
Affiliated Entity | Consultancy services with Stone Sunny Isles Inc.
Related party transactions
General and administrative	$ 100,000	$ 100,000	$ 100,000	$ 100,000