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v3.21.2

Segment Reporting and Concentrations - Additional information (Details) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2021 client | Jun. 30, 2021 client | Sep. 30, 2020 client | Jun. 30, 2020 client | Sep. 30, 2021 client segment | Sep. 30, 2020 | Dec. 31, 2020 client
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Number of Reportable Segments | segment |  |  |  |  | 3 |  |
Foreign Customer [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk | Non-US |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Concentration Risk, Percentage | 47.00% |  | 54.00% |  |  |  |
Foreign Customer [Member] | Accounts receivable | Customer Concentration Risk |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  | 44.00% |  | 55.00%
One Client [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk | US |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Number of clients | 1 |  |  |  | 1 |  |
Concentration Risk, Percentage | 10.00% |  | 13.00% |  | 11.00% | 14.00% |
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 | 46.00% |  | 55.00% |  |  |  |
Three Clients [Member] | Accounts receivable |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Number of clients |  |  |  |  | 3 |  | 3
Three Clients [Member] | Accounts receivable | Customer Concentration Risk |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  | 34.00% |  | 36.00%
Client [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk | US |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Number of clients |  | 0 |  | 0 |  |  |
Concentration Risk, Percentage |  | 10.00% |  | 10.00% |  |  |

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