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Leases - Summary of Information Related To Operating Leases (Detail) ¥ in Thousands, $ in Thousands | Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥) | Jan. 01, 2020 CNY (¥)
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Disclosure Of Supplemental Information Related To Operating Leases [Line Items] |  |  |  |
Operating lease ROU assets | ¥ 28,941 | $ 4,541 | ¥ 4,282 |
Operating lease liabilities-non-current | (17,076) | (2,680) | (587) | ¥ (3,400)
Operating lease liabilities-current | (13,929) | $ (2,186) | (3,709) | (8,300)
Total operating lease liabilities | ¥ (31,005) |  | ¥ (4,296) | ¥ (11,700)
Weighted average remaining lease term | 2 years 6 months | 2 years 6 months | 1 year 3 months 18 days |
Weighted average discount rate | 7.00% | 7.00% | 7.00% |

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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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