Other income, net - Schedule of Other Income Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Other Income and Expenses [Abstract]
Interest income	$ 490	$ 1,542
Foreign exchange gains (losses)	5	(16)
Other expenses	(44)	(9)
Other income, net	$ 451	$ 1,517