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Revenue recognition - Deferred Revenue Balances by Reportable Segment (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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Disaggregation of Revenue [Line Items] |  |  |
Total deferred revenue | $ 240,948 | $ 210,554 | $ 142,376
Enterprise |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total deferred revenue | 186,646 | 148,966 | 84,241
Consumer |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total deferred revenue | $ 54,302 | $ 61,588 | $ 58,135

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