v3.26.1
Income Taxes - Summary of Reconciliation of Effective Tax rate and Statutory Income Tax rate (Detail)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2025
CNY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
CNY (¥)
Effective Income Tax Rate Reconciliation [Line Items]        
Loss before income tax ¥ (53,790) $ (7,693) ¥ (340,741) ¥ (651,301)
Income tax expense at PRC statutory rate (13,448) (1,923) (85,185) (162,825)
Effect of different tax rates     355 (439)
Research and development super-deduction (57,595) (8,235) (15,814) (21,812)
Non-deductible expenses     38,398 69,646
Non-taxable income     (1,776) (1,807)
Expiration of Tax Attributes 12,504 1,788 14,327 12,421
Deferred only adjustment     (1,367) (3,083)
Transfer pricing adjustment     3,460 12,011
Interest and penalty 699 100 783 219
Tax rate change 870 124 (431) (13,453)
Provision to return 14,232 2,035 (7,900) 2,722
Changes in valuation allowance 14,831 2,121 60,505 98,530
Income tax expenses 1,556 223 ¥ 5,885 ¥ 2,388
Effect of PRC preferential tax rates 3,485 498    
Exchange gain and loss 7,891 1,128    
Nondeductible ESOP expense 3,548 507    
Excessive Entertainment 4,260 609    
Disposal loss 810 116    
Others Non-deductible 670 97    
Changes in Unrecognized Tax Benefits ¥ 1,335 $ 191    
Income tax expense at PRC statutory rate, Percent     25.00% 25.00%
Statutory tax rate difference between PRC and other jurisdictions, Percent 25.00% 25.00%    
Changes in valuation allowance, Percent (28.00%) (28.00%)    
Effect of PRC preferential tax rates, Percent (6.00%) (6.00%)    
Exchange gain and loss, Percent (15.00%) (15.00%)    
Nondeductible ESOP expense, Percent (7.00%) (7.00%)    
Excessive Entertainment, Percent (8.00%) (8.00%)    
Disposal loss, Percent (2.00%) (2.00%)    
Others Non-deductible, Percent (1.00%) (1.00%)    
Changes in Unrecognized Tax Benefits, Percent (2.00%) (2.00%)    
Research and development super-deduction, Percent 107.00% 107.00%    
Tax rate change, Percent (2.00%) (2.00%)    
Provision to return, Percent (26.00%) (26.00%)    
Expiration of tax attributes, Percent (23.00%) (23.00%)    
Interest and penalty, Percent (1.00%) (1.00%)    
Income tax expenses, Percent (3.00%) (3.00%)    
CAYMAN ISLANDS        
Effective Income Tax Rate Reconciliation [Line Items]        
Statutory tax rate difference between PRC and other jurisdictions ¥ 1,223 $ 175    
Statutory tax rate difference between PRC and other jurisdictions, Percent (2.00%) (2.00%)    
HONG KONG        
Effective Income Tax Rate Reconciliation [Line Items]        
Non-deductible expenses ¥ 1,008 $ 144    
Non-taxable income (1,287) (184)    
Statutory tax rate difference between PRC and other jurisdictions ¥ (144) $ (21)    
Statutory tax rate difference between PRC and other jurisdictions, Percent 0.00% 0.00%    
Non-deductible expenses, Percent (2.00%) (2.00%)    
Non-taxable income, Percent 2.00% 2.00%    
UNITED STATES        
Effective Income Tax Rate Reconciliation [Line Items]        
Deferred only adjustment ¥ 1,350 $ 193    
Changes in valuation allowance 6,210 888    
Others (54) (8)    
Statutory tax rate difference between PRC and other jurisdictions ¥ (842) $ (120)    
Statutory tax rate difference between PRC and other jurisdictions, Percent 2.00% 2.00%    
Deferred only adjustment, Percent (3.00%) (3.00%)    
Changes in valuation allowance, Percent (12.00%) (12.00%)    
Others, Percent 0.00% 0.00%    
PRC Subsidiaries [Member]        
Effective Income Tax Rate Reconciliation [Line Items]        
Income tax expense at PRC statutory rate     ¥ 530 ¥ 10,258