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Share-based Compensation (Share options, additional information) (Details) $ / shares in Units, ¥ in Thousands, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 CNY (¥) shares | Dec. 31, 2016 USD ($) $ / shares | Dec. 31, 2015 CNY (¥) shares | Dec. 31, 2015 $ / shares shares | Dec. 31, 2014 CNY (¥) | Dec. 31, 2014 $ / shares | Dec. 31, 2016 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Recognized share-based compensation | ¥ 1,890 | $ 273 | ¥ 34,354 |  | ¥ 53,181 |  |
Share Options [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Weighted-average grant date fair value of options granted (US$ per share) |  | $ 0.23 |  | $ 0.46 |  | $ 0.67 |
Recognized share-based compensation | 1,900 | $ 300 | ¥ 34,400 |  | ¥ 53,000 |  |
Unrecognized share-based compensation for options | ¥ 23,800 |  |  |  |  |  | $ 3,400
Period for recognition | 2 years 9 months 18 days | 2 years 9 months 18 days |  |  |  |  |
Share Options [Member] | Former employees [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Proceeds received from exercise of options | ¥ 1,500 |  |  |  |  |  | $ 200
Shares issued to former employees after IPO (number of shares) | shares | 5,019,865 |  |  |  |  |  | 5,019,865
Contingently issuable shares to be issued upon former employees' request (number of shares) | shares | 1,692,526 |  | 1,777,826 | 1,777,826 |  |  | 1,692,526
ADS [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Closing stock price (US$ per share) |  |  |  |  |  |  | $ 3.14
Ordinary Shares [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Closing stock price (US$ per share) |  |  |  |  |  |  | $ 0.3925

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- Definition Aggregate proceeds received by the entity at the end of reporting period from exercises of contingently issuable shares granted under equity-based payment arrangements. + References No definition available. + Details
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- Definition Aggregate shares at the end of reporting period from exercises of contingently issuable shares granted under equity-based payment arrangements. + References No definition available. + Details
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- Definition The number of shares into which fully or partially vested contingently issuable shares outstanding as of the balance sheet date can be currently converted under the option plan. + References No definition available. + Details
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- Definition The closing stock price as of the period end for calculating the aggregate intrinsic value of options outstanding and exercisable as of the period end + References No definition available. + Details
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Unrecognized cost of unvested options awarded to employees as compensation. + References No definition available. + Details
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- Definition 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. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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