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, 2023	Dec. 31, 2022	Dec. 31, 2021
Strategic Investments
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance			$ 0
Exercise of redeemable convertible preferred stock warrants			0
Vesting and remeasurement of SARs	$ 0	$ 0	0
Exercises of SARs	0
Amount reclassified from liability to equity upon exchange		0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	12,104	10,000
Unrealized loss on strategic investments	(1,793)	(2,896)
Purchases of strategic investments		5,000	10,000
Ending balance	10,311	12,104	10,000
Stock Appreciation Rights
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	462	818	268
Exercise of redeemable convertible preferred stock warrants			0
Vesting and remeasurement of SARs	(161)	(294)	550
Exercises of SARs	(253)
Amount reclassified from liability to equity upon exchange		(62)
Unrealized loss on strategic investments	0	0
Ending balance	48	462	818
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Purchases of strategic investments		0	0
Warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	0	0	160
Exercise of redeemable convertible preferred stock warrants			(160)
Vesting and remeasurement of SARs	0	0	0
Exercises of SARs	0
Amount reclassified from liability to equity upon exchange		0
Unrealized loss on strategic investments	0	0
Ending balance	$ 0	0	0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Purchases of strategic investments		$ 0	$ 0