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v3.22.1

Segment reporting and concentrations - Additional information (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 USD ($) client segment | Mar. 31, 2021 | Dec. 31, 2021 USD ($) client
Segment Reporting Information [Line Items] |  |  |
Number of Reportable Segments | segment | 3 |  |
Classification of segment assets | $ | $ 54,934 |  | $ 59,217
Foreign Customer [Member] | Accounts receivable | Customer Concentration Risk |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration Risk, Percentage | 31.00% |  | 19.00%
One Client [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk | US |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of clients | 1 |  |
Concentration Risk, Percentage | 21.00% | 12.00% |
Another client [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk | US |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of clients | 0 |  |
Concentration Risk, Percentage | 10.00% |  |
Another client [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk | Non-US |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration Risk, Percentage | 37.00% | 49.00% |
Three Clients [Member] | Accounts receivable |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of clients |  |  | 37
Three Clients [Member] | Accounts receivable | Customer Concentration Risk |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration Risk, Percentage | 31.00% |  | 10.00%

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