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v3.23.1

Concentration of Risks - Summary of External Customers with 10% or More of Group's Revenues (Detail) ¥ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 CNY (¥) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 CNY (¥) | Dec. 31, 2020 CNY (¥)
Revenue, Major Customer [Line Items] |  |  |  |
Revenue | ¥ 44,317 | $ 6,425 | ¥ 56,807 | ¥ 180,093
Cost of Revenue | 15,098 | 2,189 | 20,777 | 73,914
Supplier A [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Cost of Revenue | 3,056 | 443 | 7,807 |
Supplier B [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Cost of Revenue |  |  | 8,405 |
Supplier C [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Cost of Revenue |  |  | 7,596 |
Customer A [Member] | Customer Concentration Risk [Member] | Sales revenue product line [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue |  |  |  | 22,655
Customer B [Member] | Customer Concentration Risk [Member] | Sales revenue product line [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue |  |  |  | 92,331
Customer C [Member] | Customer Concentration Risk [Member] | Sales revenue product line [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue |  |  | 7,080 | ¥ 24,071
Customer D [Member] | Customer Concentration Risk [Member] | Sales revenue product line [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue |  |  | ¥ 19,646 |
Customer E [Member] | Customer Concentration Risk [Member] | Sales revenue product line [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue | 9,217 | 1,336 |  |
Customer F [Member] | Customer Concentration Risk [Member] | Sales revenue product line [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue | 5,611 | 814 |  |
Customer G [Member] | Customer Concentration Risk [Member] | Sales revenue product line [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Revenue | ¥ 4,630 | $ 671 |  |

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