Commitments and contingencies - Founder Royalty arrangements (Details)	9 Months Ended
Sep. 30, 2023 USD ($)
Founder Royalty arrangements
Period of royalty payments agreed under arrangement	10 years
Royalties earned	$ 0
Royalties paid	0
Founders and initial investors \| Royalty Agreements
Founder Royalty arrangements
Royalties earned	0
Royalties paid	$ 0

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details