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Income Taxes - Summary of Composition of Income Tax Expense (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2022
CNY (¥)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
CNY (¥)
Dec. 31, 2020
CNY (¥)
Income Tax Disclosure [Abstract]        
Current income tax expense ¥ (26) $ (4) ¥ (32) ¥ (86)
Deferred tax benefit 481 70    
Total income tax expense ¥ 455 $ 66 ¥ (32) ¥ (86)