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Income Taxes - Summary of Principle Components of Deferred Tax Assets (Detail)
¥ in Thousands, $ in Thousands
Dec. 31, 2024
CNY (¥)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
CNY (¥)
Components of Deferred Tax Assets [Abstract]      
Accruals and reserves ¥ 35,942 $ 4,924 ¥ 34,972
Net operating loss carried forward 228,450 31,298 217,850
Depreciation and amortization 1,460 200 476
Excessive education fee 521 71 556
Capitalized research and development expense 20,048 2,747 20,513
Research and development expense recognition 295,499 40,483 258,008
Deferred revenue recognition 1,993 273 775
Excessive donation expense carried forward 1,943 266 1,881
Impairment loss on fixed asset and intangible asset 8,884 1,216 0
Operating lease liabilities 13,195 1,808 3,113
Fair value change on financial assets 1,330 182 0
Gross deferred tax assets 609,265 83,468 538,144
Less: Valuation allowance (595,868) (81,633) (535,363)
Total deferred tax assets 13,397 1,835 2,781
Deferred tax liabilities:      
Operating right-of-use assets (13,397) (1,835) (2,781)
Total deferred tax liabilities (13,397) (1,835) (2,781)
Net deferred tax assets ¥ 0 $ 0 ¥ 0