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Loss Per Share - Schedule of Earnings Per Share, Basic and Diluted (Detail)
¥ / shares in Units, $ / shares in Units, ¥ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2024
CNY (¥)
¥ / shares
shares
Dec. 31, 2024
USD ($)
$ / shares
shares
Dec. 31, 2023
CNY (¥)
¥ / shares
shares
Dec. 31, 2022
CNY (¥)
¥ / shares
shares
Common Class A [Member]        
Denominator:        
Weighted-average number of ordinary shares outstanding – basic 85,610,197 85,610,197 85,071,691 86,584,100
Weighted-average number of ordinary shares outstanding – diluted 85,610,197 85,610,197 85,071,691 86,584,100
Loss per share - basic | (per share) ¥ (3.37) $ (0.46) ¥ (6.38) ¥ (9.35)
Loss per share - diluted | (per share) ¥ (3.37) $ (0.46) ¥ (6.38) ¥ (9.35)
Common Class B [Member]        
Denominator:        
Weighted-average number of ordinary shares outstanding – basic 17,324,848 17,324,848 17,324,848 17,324,848
Weighted-average number of ordinary shares outstanding – diluted 17,324,848 17,324,848 17,324,848 17,324,848
Loss per share - basic | (per share) ¥ (3.37) $ (0.46) ¥ (6.38) ¥ (9.35)
Loss per share - diluted | (per share) ¥ (3.37) $ (0.46) ¥ (6.38) ¥ (9.35)
Common Stock [Member] | Common Class A [Member]        
Numerator:        
Net loss attributable to ordinary shareholders ¥ (288,286) $ (39,496) ¥ (543,089) ¥ (809,298)
Denominator:        
Weighted-average number of ordinary shares outstanding 85,610,197 85,610,197 85,188,137 87,005,610
Effect of unvested restricted shares 0 0 (116,446) (421,510)
Common Stock [Member] | Common Class B [Member]        
Numerator:        
Net loss attributable to ordinary shareholders ¥ (58,340) $ (7,993) ¥ (110,600) ¥ (161,935)
Denominator:        
Weighted-average number of ordinary shares outstanding 17,324,848 17,324,848 17,324,848 17,324,848
Effect of unvested restricted shares 0 0 0 0