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Share-Based Compensation - Summary of Total Compensation Costs Recognized (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2019 CNY (¥)
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Total | ¥ 30,212 | $ 4,741 | ¥ 28,858 | ¥ 47,284
Cost of Revenue |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Total | 41 | 6 | 4 | 73
Research and Development |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Total | 13,801 | 2,166 | 7,176 | 12,819
Sales and Marketing |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Total | 2,609 | 409 | 3,965 | 6,040
General and Administrative |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Total | ¥ 13,761 | $ 2,160 | ¥ 17,713 | ¥ 28,352

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