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Share Based Compensation - Summary of Recognized Share based Compensation Expenses (Detail) ¥ 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 (¥)
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Share based compensation Expenses | ¥ 315,362 | $ 49,487 | ¥ 153,110 | ¥ 1,990
Fulfillment Expenses [Member] |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Share based compensation Expenses | 32,673 | 5,127 | 1,974 | 258
Selling and Marketing Expense [Member] |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Share based compensation Expenses | 6,927 | 1,087 | 532 | 174
Product Development Expense [Member] |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Share based compensation Expenses | 42,666 | 6,695 | 4,370 | 1,043
General and Administrative Expense [Member] |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Share based compensation Expenses | ¥ 233,096 | $ 36,578 | ¥ 146,234 | ¥ 515

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