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Segment reporting and concentrations - Additional information (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 USD ($) customer | Sep. 30, 2023 | Jun. 30, 2023 customer | Sep. 30, 2024 USD ($) segment customer | Sep. 30, 2023 customer | Dec. 31, 2023 USD ($) customer
Segment reporting and concentrations |  |  |  |  |  |
Number of reporting segments | segment |  |  |  | 3 |  |
Right-of-use-asset, net | $ | $ 4,435 |  |  | $ 4,435 |  | $ 5,054
Sales revenue, net | Customer concentration risk | Non-US |  |  |  |  |  |
Segment reporting and concentrations |  |  |  |  |  |
Concentration risk, percentage | 17.00% | 40.00% |  | 24.00% | 42.00% |
Foreign customer | Accounts receivable | Customer concentration risk |  |  |  |  |  |
Segment reporting and concentrations |  |  |  |  |  |
Concentration risk, percentage |  |  |  | 14.00% |  | 31.00%
One customer | Sales revenue, net | Customer concentration risk |  |  |  |  |  |
Segment reporting and concentrations |  |  |  |  |  |
Number of clients | 1 |  | 1 | 1 | 1 |
Concentration risk, percentage | 59.00% | 11.00% |  | 44.00% |  |
One customer | Accounts receivable | Customer concentration risk |  |  |  |  |  |
Segment reporting and concentrations |  |  |  |  |  |
Number of clients |  |  |  | 1 |  |
Concentration risk, percentage |  |  |  | 55.00% |  |
Two customer | Sales revenue, net | Customer concentration risk |  |  |  |  |  |
Segment reporting and concentrations |  |  |  |  |  |
Number of clients |  |  |  |  | 2 |
Concentration risk, percentage |  |  |  |  | 10.20% |
Other customer | Sales revenue, net | Customer concentration risk |  |  |  |  |  |
Segment reporting and concentrations |  |  |  |  |  |
Concentration risk, percentage |  |  |  |  | 10.00% |
Three customer | Accounts receivable | Customer concentration risk |  |  |  |  |  |
Segment reporting and concentrations |  |  |  |  |  |
Number of clients |  |  |  |  |  | 3
Concentration risk, percentage |  |  |  | 53.00% |  | 53.00%
Customer | Customer concentration risk | United States |  |  |  |  |  |
Segment reporting and concentrations |  |  |  |  |  |
Number of clients | 0 |  |  | 0 |  |
Customer | Accounts receivable | Customer concentration risk |  |  |  |  |  |
Segment reporting and concentrations |  |  |  |  |  |
Number of clients |  |  |  | 0 |  | 0
Customer | Minimum | Sales revenue, net | Customer concentration risk |  |  |  |  |  |
Segment reporting and concentrations |  |  |  |  |  |
Concentration risk, percentage | 10.00% |  |  | 10.00% |  |
Customer | Minimum | Accounts receivable | Customer concentration risk |  |  |  |  |  |
Segment reporting and concentrations |  |  |  |  |  |
Concentration risk, percentage |  |  |  | 10.00% |  | 10.00%

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