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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of shares authorized for issuance under share-based payment arrangement.

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An excess of the fair value of the modified award over the fair value of the award immediately before the modification.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Share-Based Compensation - Additional Information (Detail) $ / shares in Units, ¥ in Thousands, $ in Thousands			12 Months Ended
	Apr. 24, 2014 shares	Jan. 02, 2014 shares	Dec. 31, 2022 CNY (¥) shares	Dec. 31, 2022 USD ($) $ / shares	Dec. 31, 2021 CNY (¥) shares	Dec. 31, 2021 $ / shares shares	Dec. 31, 2020 CNY (¥) shares	Dec. 31, 2020 $ / shares shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2019 shares	May 26, 2011 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected period over which unamortized compensation costs is to be recognized			¥ 2,057						$ 298
Expected period over which unamortized compensation costs is to be recognized			1 year 1 month 6 days	1 year 1 month 6 days
Share-Based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, incremental cost as a result of modification \| ¥							¥ 4,770
2014 Restricted Share Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares subject to award	122,545,665
Granted \| $ / shares						$ 0.14
Unvested			4,028,550		6,562,640	6,562,640	3,640,002	3,640,002	4,028,550	16,448,965
2014 Restricted Share Plan \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected period over which unamortized compensation costs is to be recognized			2 years	2 years
Total fair value of vested shares			¥ 933	$ 135	¥ 2,696		¥ 18,263
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount			¥ 2,257						$ 327
2013 Incentive Scheme
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares subject to award		64,497,718
Granted \| $ / shares				$ 0.08		$ 0.17		$ 0.21
Award scheme term			10 years	10 years
Unvested			5,086,990		7,596,470	7,596,470	4,254,730	4,254,730	5,086,990	4,909,057
2013 Incentive Scheme \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected period over which unamortized compensation costs is to be recognized			1 year 10 months 24 days	1 year 10 months 24 days
Total fair value of vested shares			¥ 1,409	$ 204	¥ 2,199		¥ 46,906
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount			¥ 2,773						$ 402
2013 Incentive Scheme \| Share-Based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, incremental cost as a result of modification \| ¥							24,860
2011 Share Award Scheme
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award scheme term			10 years	10 years
2011 Share Award Scheme \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted \| $ / shares						$ 0.26		$ 0.21
Expected period over which unamortized compensation costs is to be recognized			¥ 38						$ 5
Expected period over which unamortized compensation costs is to be recognized			10 months 24 days	10 months 24 days
Total fair value of vested shares				$ 6	¥ 2,154		¥ 1,697
Unvested			87,175		208,950	208,950	1,943,725	1,943,725	87,175	4,066,803
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		5 years
Maximum [Member] \| 2014 Restricted Share Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	5 years
Maximum [Member] \| 2011 Share Award Scheme
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares subject to award											100,000,000