Investments and fair value measurements - Summary of the Changes in the Fair Value of Level 3 Financial Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Strategic Investments
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 10,311	$ 12,104	$ 10,000
Vesting and remeasurement of SARs	0	0	0
Purchase of strategic investments			5,000
Amount reclassified from liability to equity upon exchange			0
Exercises of SARs	0	0
Unrealized loss on strategic investments	(10,311)	(1,793)	(2,896)
Ending balance	0	10,311	12,104
Stock Appreciation Rights
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	48	462	818
Vesting and remeasurement of SARs	(34)	(161)	(294)
Purchase of strategic investments			0
Amount reclassified from liability to equity upon exchange			(62)
Exercises of SARs	(7)	(253)
Unrealized loss on strategic investments	0	0	0
Ending balance	$ 7	$ 48	$ 462