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Other Current Assets - Summary of Other Current Assets (Parenthetical) (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 (¥)
Other Current Assets [line items] |  |  |  |
Proceeds from disposal of equity securities | ¥ 6,500 | $ 1,026 | ¥ 1,354 | ¥ 16,429
Gain on disposal on equity investments | ¥ 5,400 | $ 900 | ¥ 900 |

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- Definition The cash inflow from sales or maturity of financial instruments, classified as investing activities. [Refer: Financial instruments, class [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2021-01-01 -Paragraph 16 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2021-en-r&anchor=para_16&doctype=Standard -URIDate 2021-03-24 + Details
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