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Company Financial Statements (Parent Company Only) - Condensed Balance Sheets (Detail)
¥ in Thousands, $ in Thousands
Dec. 31, 2022
CNY (¥)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
CNY (¥)
Dec. 31, 2020
CNY (¥)
Dec. 31, 2019
CNY (¥)
Current assets:          
Cash and cash equivalents ¥ 249,310 $ 36,147 ¥ 246,863 ¥ 137,840  
Amounts due from a subsidiary 0 0 1,360    
Total current assets 387,155 56,132 477,150    
Non-current assets:          
Total non-current assets 143,712 20,837 58,284    
Total assets 530,867 76,969 535,434    
Current liabilities          
Accruals and other liabilities 97,763 14,175 61,851    
Total current liabilities 282,341 40,936 136,447    
Non-current liabilities:          
Total non-current liabilities 123,848 17,956 64,941    
Total liabilities 406,189 58,892 201,388    
Shareholders' equity:          
Statutory reserves 1,191 173 1,191    
Accumulated deficit (1,450,374) (210,284) (1,122,153)    
Accumulated other comprehensive (loss) income 15,010 2,176 (5,886)    
Total shareholders' equity 124,678 18,077 334,046 ¥ 277,700 ¥ 315,355
Total liabilities and shareholders' equity 530,867 76,969 535,434    
Common Class A [Member]          
Shareholders' equity:          
Common stock 51 8 50    
Common Class B [Member]          
Shareholders' equity:          
Common stock 24 3 25    
Parent Company [Member]          
Current assets:          
Cash and cash equivalents 362 52 72,998    
Amounts due from a subsidiary 13,697 1,986 0    
Total current assets 14,059 2,038 72,998    
Non-current assets:          
Investments in subsidiaries 213,579 30,966 290,462    
Total non-current assets 213,579 30,966 290,462    
Total assets 227,638 33,004 363,460    
Current liabilities          
Accruals and other liabilities 27,432 3,977 3,744    
Amounts due to the subsidiaries the VIEs 11,230 1,628 0    
Total current liabilities 38,662 5,605 3,744    
Non-current liabilities:          
Net interests of the VIEs 64,718 9,383 27,115    
Total non-current liabilities 64,718 9,383 27,115    
Total liabilities 103,380 14,988 30,859    
Shareholders' equity:          
Additional paid-in capital 1,558,356 225,940 1,459,374    
Statutory reserves 1,191 173 1,191    
Accumulated deficit (1,450,374) (210,284) (1,122,153)    
Accumulated other comprehensive (loss) income 15,010 2,176 (5,886)    
Total shareholders' equity 124,258 18,016 332,601    
Total liabilities and shareholders' equity 227,638 33,004 363,460    
Parent Company [Member] | Common Class A [Member]          
Shareholders' equity:          
Common stock 51 8 50    
Parent Company [Member] | Common Class B [Member]          
Shareholders' equity:          
Common stock ¥ 24 $ 3 ¥ 25