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Subsequent Events - Additional Information (Detail) ¥ in Thousands, $ in Thousands | Mar. 21, 2018 USD ($) | Mar. 21, 2018 CNY (¥) | Dec. 31, 2017 CNY (¥) | Dec. 31, 2016 CNY (¥) | Jun. 30, 2016 USD ($) | Jun. 30, 2016 CNY (¥) | Dec. 31, 2015 CNY (¥)
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Subsequent Event [Line Items] |  |  |  |  |  |  |
Total consideration |  |  | ¥ 312,176 | ¥ 150,000 |  |  | ¥ 101,000
Unis Tech |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Total consideration |  |  | ¥ 49,000 | ¥ 49,000 | $ 7,057 | ¥ 49,000 |
Equity interest, percentage |  |  |  |  | 49.00% | 49.00% |
Subsequent Event | Unis Tech | Unisplendour Corporation Limited |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Percentage of ownership transferred | 51.00% |  |  |  |  |  |
Total consideration | $ 7,531 | ¥ 49,000 |  |  |  |  |
Equity interest, percentage | 49.00% | 49.00% |  |  |  |  |

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- Definition This element represents the aggregate cost of investments accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Balance Type: | debit
Period Type: | instant

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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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- Definition Percentage of ownership interests transferred. + References No definition available. + Details
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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
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- Details
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