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Segment reporting and concentrations - Additional information (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023 USD ($) customer segment	Mar. 31, 2022 customer	Dec. 31, 2022 USD ($) customer
Segment reporting information
Number of reportable segments | segment	3
Right-of-use-asset, net | $	$ 4,109		$ 4,309
Classification of segment assets | $	$ 49,135		$ 48,042
Sales revenue,net | Customer concentration risk | Non-US
Segment reporting information
Concentration risk, percentage	39.00%	37.00%
Foreign customer | Accounts receivable | Customer concentration risk
Segment reporting information
Concentration risk, percentage	38.00%		44.00%
One client | Sales revenue,net | Customer concentration risk
Segment reporting information
Number of clients	1
Concentration risk, percentage	11.00%
Another client | Sales revenue,net | Customer concentration risk
Segment reporting information
Concentration risk, percentage	11.00%	21.00%
Another client | Accounts receivable | Customer concentration risk
Segment reporting information
Number of clients	2
Concentration risk, percentage	30.00%
Four clients | Accounts receivable | Customer concentration risk
Segment reporting information
Number of clients			4
Concentration risk, percentage			45.00%
Client | Sales revenue,net | Customer concentration risk | United States
Segment reporting information
Number of clients	0	0
Client | Accounts receivable | Customer concentration risk
Segment reporting information
Number of clients	0		0
Client | Minimum | Sales revenue,net | Customer concentration risk
Segment reporting information
Concentration risk, percentage	10.00%	10.00%
Client | Minimum | Accounts receivable | Customer concentration risk
Segment reporting information
Concentration risk, percentage	10.00%		10.00%

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