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Property and Equipment, Net - Schedule of property and equipment, net (Detail) ¥ in Thousands, $ in Thousands	Sep. 30, 2020 CNY (¥)	Sep. 30, 2020 USD ($)	Dec. 31, 2019 CNY (¥)
Property, Plant and Equipment [Line Items]
Property,plant and equipment, gross	¥ 81,610		¥ 58,332
Less: accumulated depreciation	(42,122)		(33,781)
Net book value	39,488	$ 5,816	24,551
Servers and computers [Member]
Property, Plant and Equipment [Line Items]
Property,plant and equipment, gross	71,260		53,428
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property,plant and equipment, gross	6,564		1,645
Furniture, fixtures and office equipment [Member]
Property, Plant and Equipment [Line Items]
Property,plant and equipment, gross	¥ 3,786		¥ 3,259

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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