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Others, Net - Schedule of other nonoperating income expense (Detail) ¥ in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2020 CNY (¥)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 CNY (¥)
Other Nonoperating Income (Expense) [Abstract]
Value-added tax exemption due to the COVID-19	¥ 29,469
Government grants	25,333		¥ 10,928
Fair value changes of short-term investments	7,119		836
Foreign exchange gain/(loss)	(8,182)		5,724
Others	(2,192)		(296)
Total	¥ 51,547	$ 7,592	¥ 17,192

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- Definition

Fair Value Changes Of Short Term Investments.

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- Definition

Amount of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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- Definition

Governments grants.

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- Definition

Value added tax exemption

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No definition available.

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- Definition

The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.7)
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

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- Definition

Amount of income (expense) related to nonoperating activities, classified as other.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.9)
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

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