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Share Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of Employee Share Option Activity Under Twenty Ten Plan | The following table summarizes the Company’s employee share option activity under the 2010 Plan:
|  | Number of options |  |  | Weighted average exercise price |  |  | Weighted average remaining contractual term |  |  | Aggregate intrinsic value |
|  |  |  |  | (US$) |  |  | (Years) |  |  | (US$) |
Outstanding, January 1, 2017 |  |  | 2,031,940 |  |  |  | 0.48 |  |  |  | 4.7 |  |  |  |  |
Exercised |  |  | (332,754 | ) |  |  | 0.41 |  |  |  |  |  |  |  |  |
Outstanding, December 31, 2017 |  |  | 1,699,186 |  |  |  | 0.49 |  |  |  | 3.5 |  |  |  | 1,432 |
Vested and expected to vest at December 31, 2017 |  |  | 1,699,186 |  |  |  | 0.49 |  |  |  | 3.5 |  |  |  | 1,432 |
Exercisable as of December 31, 2017 |  |  | 1,699,186 |  |  |  | 0.49 |  |  |  | 3.5 |  |  |  | 1,432 |
Restricted Stock Units Activity | The following table summarizes the Company’s RSUs activity under the 2014 Plan:
|  | Number of RSUs |  |  | Weighted average grant date fair value |  |  | Weighted average remaining contractual life |  |  | Aggregate intrinsic value |
|  |  |  |  | (US$) |  |  | (Years) |  |  | (US$) |
Unvested, January 1, 2017 |  |  | 2,271,684 |  |  |  | 13.25 |  |  |  | 8.5 |  |  |  |  |
Granted |  |  | 1,080,260 |  |  |  | 6.31 |  |  |  |  |  |  |  |  |
Vested |  |  | (1,762,733 | ) |  |  | 10.35 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (72,313 | ) |  |  | 11.52 |  |  |  |  |  |  |  |  |
Unvested, December 31, 2017 |  |  | 1,516,898 |  |  |  | 11.76 |  |  |  | 7.9 |  |  |  | 12,105 |
Total Compensation Expense Recognized Relating to Options Granted to Employees | Total compensation expense relating to share options and RSUs granted to employees recognized for the years ended December 31, 2015, 2016 and 2017 is as follows:
|  | For the year ended December 31, |
|  | 2015 |  |  | 2016 |  |  | 2017 |
|  | RMB |  |  | RMB |  |  | RMB |  |  | US$ |
Cost of revenues |  |  | 12,422 |  |  |  | (4,110 | ) |  |  | (277 | ) |  |  | (43 | )
Sales and marketing expenses |  |  | 13,488 |  |  |  | 2,490 |  |  |  | (681 | ) |  |  | (104 | )
General and administrative expenses |  |  | 153,814 |  |  |  | 123,273 |  |  |  | 47,945 |  |  |  | 7,369 |
Research and development expenses |  |  | 10,303 |  |  |  | (2,924 | ) |  |  | 142 |  |  |  | 22 |
|  |  | 190,027 |  |  |  | 118,729 |  |  |  | 47,129 |  |  |  | 7,244 |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 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=96867065&loc=d3e5047-113901 Reference 3: 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 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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