Fair value measurements - Schedule of Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investment securities, current	$ 776	$ 454
Equity investment securities, non-current	0	151
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investment securities, current	776	454
Equity investment securities, non-current	0	151
Total	776	605
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
5-Year Private Warrants	$ 0	$ 6