Other income, net - Schedule of Other Income Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Other Income and Expenses [Abstract]
Interest income	$ 19	$ 490
Foreign exchange gains (losses)	(1)	5
Other expenses	(12)	(44)
Other income, net	$ 6	$ 451