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Condensed Financial Information of the Parent Company - Schedule of Condensed Statements of Comprehensive Loss (Detail)
¥ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2024
CNY (¥)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2022
CNY (¥)
Revenues ¥ 515,822 $ 70,667 ¥ 537,435 ¥ 563,238
Cost of revenues 153,422 21,020 174,208 183,199
Gross Profit 362,400 49,647 363,227 380,039
Operating expenses:        
General and administrative expenses 261,638 35,844 437,821 568,284
Impairment loss on long-lived assets 35,127 4,812 0 0
Loss from operations (357,559) (48,987) (669,321) (980,407)
Interest income 12,212 1,673 17,956 9,356
Loss before income taxes (340,741) (46,683) (651,301) (969,248)
Income tax expenses 5,885 806 2,388 1,985
Net loss (346,626) (47,489) (653,689) (971,233)
Other comprehensive (loss) income, net of tax of nil:        
Foreign currency translation adjustments 3,485 477 4,189 41,347
Total comprehensive loss (343,141) (47,012) (649,500) (929,886)
Parent Company [Member]        
Revenues 0 0 0 0
Cost of revenues 0 0 0 0
Gross Profit 0 0 0 0
Operating expenses:        
General and administrative expenses (13,128) (1,799) (11,616) (31,041)
Impairment loss on long-lived assets (102) (14) 0 0
Share of losses in subsidiaries, the VIE and the VIE's subsidiaries (337,078) (46,181) (645,522) (943,534)
Total operating expenses (350,308) (47,994) (657,138) (974,575)
Loss from operations (350,308) (47,994) (657,138) (974,575)
Interest income 4,021 551 3,811 3,636
Other expense, net (339) (46) (362) (294)
Loss before income taxes (346,626) (47,489) (653,689) (971,233)
Income tax expenses 0 0 0 0
Net loss (346,626) (47,489) (653,689) (971,233)
Other comprehensive (loss) income, net of tax of nil:        
Foreign currency translation adjustments 3,485 477 4,189 41,347
Total comprehensive loss ¥ (343,141) $ (47,012) ¥ (649,500) ¥ (929,886)