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Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Detail) ¥ in Thousands, $ in Thousands | Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥)
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Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |  |  |  |
Prepayments | [1] | ¥ 216,264 | $ 33,937 | ¥ 299,154
Rental and other deposits |  | 20,371 | 3,197 | 10,867
Receivables from third-party payment platform |  | 9,899 | 1,553 | 86,777
Interest receivable |  | 1,495 | 235 | 114,726
Staff advances |  | 1,395 | 219 | 2,070
Other receivables |  | 30,824 | 4,836 | 49,588
Prepaid expenses and other current assets |  | ¥ 280,248 | $ 43,977 | ¥ 563,182
[1] | Prepayments primarily include prepaid VAT and surcharges, prepaid promotional expenses and service fee.

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