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Acquisition - Additional Information (Detail) ¥ in Thousands, $ in Thousands			12 Months Ended
	Apr. 30, 2021 USD ($)	Oct. 31, 2020 USD ($)	Dec. 31, 2020 CNY (¥)	Jun. 30, 2021	Dec. 31, 2020 USD ($)
cash consideration | ¥			¥ 935,932
TTP Member [Member]
Percentage of voting interests acquired				51.00%	51.00%
Exclusive Technical Consulting And Service Agreements [Member]
Business acquisition, transaction costs		$ 168,000
First Closing Transaction [Member]
Percentage of equity interests on converted basis					48.87%
First Closing Transaction [Member] | Exclusive Technical Consulting And Service Agreements [Member]
Business acquisition, transaction costs					$ 143,000
Percentgae of exchange preferred shares			31.48%
Second Closing Transaction [Member] | TTP Member [Member]
Percentage of equity interests on converted basis	51.00%
cash consideration	$ 25,000
Second Closing Transaction [Member] | Exclusive Technical Consulting And Service Agreements [Member]
Business acquisition, transaction costs	$ 25,000
Percentgae of exchange preferred shares	4.17%
Convertible Debt Securities [Member] | Exclusive Technical Consulting And Service Agreements [Member]
Business acquisition, right to purchase		$ 200,000

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
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