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Income Taxes - Summary of Reconciliation of Effective Tax rate and Statutory Income Tax rate (Detail) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2024 CNY (¥) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 CNY (¥) | Dec. 31, 2022 CNY (¥)
Loss before income tax | ¥ (340,741) | $ (46,683) | ¥ (651,301) | ¥ (969,248)
PRC statutory income tax rate | 25.00% | 25.00% | 25.00% | 25.00%
Income tax at statutory tax rate | ¥ (85,185) | $ (11,671) | ¥ (162,825) | ¥ (242,312)
Effect of different tax rates | 355 | 49 | (439) | 3,391
Research and development super-deduction | (15,814) | (2,167) | (21,812) | (13,376)
Non-deductible expenses | 38,398 | 5,261 | 69,646 | 66,254
Non-taxable income | (1,776) | (243) | (1,807) | (575)
Expiration of Tax Attributes | 14,327 | 1,963 | 12,421 | 6,540
Deferred only adjustment | (1,367) | (188) | (3,083) | 0
Transfer pricing adjustment | 3,460 | 474 | 12,011 | 7,342
Interest and penalty | 783 | 107 | 219 | 0
Tax rate change | (431) | (59) | (13,453) | 1,102
Provision to return | (7,900) | (1,082) | 2,722 | (120)
Changes in valuation allowance | 60,505 | 8,289 | 98,530 | 172,637
income tax expenses | 5,885 | 806 | 2,388 | 1,985
PRC Subsidiaries [Member] |  |  |  |
Income tax at statutory tax rate | ¥ 530 | $ 73 | ¥ 10,258 | ¥ 1,102

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 231 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-231 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.1.Q1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479360/740-10-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 + Details
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