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Summary of Significant Accounting Policies - Stock-based compensation cost (Details) - USD ($) $ in Thousands |  | 12 Months Ended
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Dec. 03, 2021 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Stock-based compensation cost | $ 5,400 | $ 5,579 | $ 19,169 | $ 23,565
Cost of revenue, excluding depreciation and amortization |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Stock-based compensation cost |  | 870 | 3,028 | 2,788
Sales and marketing |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Stock-based compensation cost |  | 960 | 3,026 | 4,829
General and administrative |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Stock-based compensation cost |  | 3,911 | 9,251 | 15,052
Research and development |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Stock-based compensation cost |  | $ (162) | $ 3,864 | $ 896

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479830/718-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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