Summary of significant accounting policies - Capitalized Costs (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Capitalized costs	$ 19,593	$ 12,751
Other current assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Capitalized costs	3,266	1,860
Other assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Capitalized costs	$ 16,327	$ 10,891