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Segment reporting and concentrations - Additional information (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022	Jun. 30, 2023 USD ($) customer segment	Jun. 30, 2022	Dec. 31, 2022 USD ($) customer
Segment reporting information
Number of reportable segments | segment			3
Right-of-use-asset, net | $	$ 3,938		$ 3,938		$ 4,309
Classification of segment assets | $	$ 51,605		$ 51,605		$ 48,042
Sales revenue, net | Customer concentration risk
Segment reporting information
Number of clients			2
Sales revenue, net | Customer concentration risk | Non-US
Segment reporting information
Concentration risk, percentage	44.00%	38.00%	42.00%	38.00%
Foreign customer | Accounts receivable | Customer concentration risk
Segment reporting information
Concentration risk, percentage			49.00%		44.00%
One client | Sales revenue, net | Customer concentration risk
Segment reporting information
Number of clients			1
Concentration risk, percentage	10.00%	10.00%	10.70%
Another client | Sales revenue, net | Customer concentration risk
Segment reporting information
Concentration risk, percentage		13.00%	10.60%	17.00%
Another client | Accounts receivable | Customer concentration risk
Segment reporting information
Number of clients			2
Concentration risk, percentage			25.00%
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
Segment reporting information
Number of clients			0
Client | Sales revenue, net | Customer concentration risk | United States
Segment reporting information
Number of clients			0
Client | Accounts receivable | Customer concentration risk
Segment reporting information
Number of clients			0
Client | Minimum | Sales revenue, net | Customer concentration risk
Segment reporting information
Concentration risk, percentage			10.00%
Client | Minimum | Accounts receivable | Customer concentration risk
Segment reporting information
Concentration risk, percentage					10.00%

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