Movement of allowance for credit losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at Beginning of Year	$ 443	$ 315	$ 418
Provision/Adjustment	945	132	45
Write-offs	(47)	0	(148)
Net Foreign Currency Exchange Rate Changes	22	(4)	0
Balance at End of Year	$ 1,363	$ 443	$ 315