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Inventories - Summary of Inventories (Detail)
¥ in Thousands, $ in Thousands
Dec. 31, 2022
CNY (¥)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
CNY (¥)
Inventory Disclosure [Abstract]      
Raw materials ¥ 49,127 $ 7,123 ¥ 62,462
Work in progress 4,939 716 17,134
Finished goods 28,188 4,087 27,168
Inventories, total 82,254 11,926 106,764
Inventories provision (9,890) (1,434) (28,689)
Inventories ¥ 72,364 $ 10,492 ¥ 78,075