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Revenue From Contracts With Customers - Additional Informational (Detail) ¥ in Thousands, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2021 USD ($)
Contract With Customer Asset And Liability [Line Items] |  |  |  |  |
Contract with customer, liability, revenue recognized | ¥ 117,800 | $ 18,500 | ¥ 57,400 | ¥ 4,000 |
Deferred income,current | ¥ 2,900 |  | 16,600 |  | $ 400
Revenue, remaining performance obligation, expected timing of satisfaction, explanation | future periods upon the usage of the prepaid card balances to purchase the Group’s products. | future periods upon the usage of the prepaid card balances to purchase the Group’s products. |  |  |
Contract with customer liability, current | ¥ 96,800 |  | 57,100 |  | 15,200
Loyalty Points Program [Member] |  |  |  |  |
Contract With Customer Asset And Liability [Line Items] |  |  |  |  |
Revenue, remaining performance obligation, expected timing of satisfaction, explanation | will be recognized as revenues when the points are redeemed | will be recognized as revenues when the points are redeemed |  |  |
Membership [Member] |  |  |  |  |
Contract With Customer Asset And Liability [Line Items] |  |  |  |  |
Deferred income,current | ¥ 143,800 |  | ¥ 66,765 |  | $ 22,600
Membership [Member] | Minimum [Member] |  |  |  |  |
Contract With Customer Asset And Liability [Line Items] |  |  |  |  |
Revenue, remaining performance obligation, expected timing of satisfaction, period | 1 month |  |  |  | 1 month
Membership [Member] | Maximum [Member] |  |  |  |  |
Contract With Customer Asset And Liability [Line Items] |  |  |  |  |
Revenue, remaining performance obligation, expected timing of satisfaction, period | 12 months |  |  |  | 12 months
Corporate Customers [Member] | Minimum [Member] |  |  |  |  |
Contract With Customer Asset And Liability [Line Items] |  |  |  |  |
Revenue from contract with customers, Billing terms | 7 days | 7 days |  |  |
Corporate Customers [Member] | Maximum [Member] |  |  |  |  |
Contract With Customer Asset And Liability [Line Items] |  |  |  |  |
Revenue from contract with customers, Billing terms | 30 days | 30 days |  |  |

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- Definition Amount of deferred income excluding obligation to transfer product and service to customer for which consideration has been received or is receivable, classified as current. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28183603&loc=d3e692-112598 + Details
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- Definition Description of when remaining performance obligation is expected to be recognized as revenue. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045 + Details
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- Definition Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045 + Details
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