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SHARE-BASED COMPENSATION (Details)
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12 Months Ended | 0 Months Ended | 12 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | 12 Months Ended | 0 Months Ended | |||||||||||||||||||||||||||
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Dec. 31, 2013
Options
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Dec. 31, 2012
Options
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Dec. 31, 2011
Options
|
Dec. 31, 2013
Options
Minimum
USD ($)
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Dec. 31, 2012
Options
Minimum
USD ($)
|
Dec. 31, 2011
Options
Minimum
USD ($)
|
Dec. 31, 2013
Options
Maximum
USD ($)
|
Dec. 31, 2012
Options
Maximum
USD ($)
|
Dec. 31, 2011
Options
Maximum
USD ($)
|
Dec. 31, 2013
2007 and 2008 Option Plans
Options
schedule
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Dec. 31, 2013
2007 and 2008 Option Plans
Options
Vesting schedule one
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Dec. 31, 2013
2007 and 2008 Option Plans
Options
Vesting schedule two
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Oct. 16, 2008
2007 Plan
Options
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Aug. 09, 2011
2008 Plan
Options
CNY
employee
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Feb. 26, 2011
2008 Plan
Options
employee
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May 28, 2009
2008 Plan
Options
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Dec. 31, 2013
2010 Plan
Options
schedule
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May 20, 2010
2010 Plan
Options
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Dec. 31, 2013
2010 Plan
Options
Minimum
|
Dec. 31, 2013
2010 Plan
Options
Maximum
|
Dec. 31, 2013
2010 Plan
Options
Vesting schedule one
|
Dec. 31, 2013
2010 Plan
Options
Vesting schedule two
|
Dec. 31, 2013
2010 Plan
Options
Vesting schedule three
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Dec. 31, 2013
2011 Plan
Minimum
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Jul. 02, 2012
2011 Plan
Maximum
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Dec. 31, 2013
2011 Plan
Maximum
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Mar. 26, 2013
2011 Plan
Options
USD ($)
employee
|
Mar. 26, 2013
2011 Plan
Options
CNY
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Jul. 02, 2012
2011 Plan
Options
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Dec. 31, 2013
2011 Plan
Options
schedule
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Jun. 20, 2011
2011 Plan
Options
|
Dec. 31, 2013
2011 Plan
Options
Vesting schedule one
|
Dec. 31, 2013
2011 Plan
Options
Vesting schedule two
|
Dec. 31, 2013
2011 Plan
Options
Vesting schedule three
|
Dec. 31, 2013
2011 Plan
Options
Vesting schedule four
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Jan. 02, 2012
2010 Plan and 2011
Options
USD ($)
|
Jan. 02, 2012
2010 Plan and 2011
Options
CNY
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| Share-based compensation | |||||||||||||||||||||||||||||||||||||
| Aggregate number of shares that can be purchased | 14,000,000 | 8,600,000 | 9,000,000 | 22,000,000 | |||||||||||||||||||||||||||||||||
| Specified percentage of total issued and outstanding ordinary shares which can be issued under the plan | 5.00% | ||||||||||||||||||||||||||||||||||||
| Threshold percentage of the unissued ordinary shares reserved in the Award Pool to the total then issued and outstanding ordinary shares, under which the shares reserved in the Award Pool shall be increased automatically | 1.00% | ||||||||||||||||||||||||||||||||||||
| Percentage of ordinary shares reserved in the Award Pool to the then issued and outstanding ordinary shares, immediately after automatic increase pursuant to the plan | 5.00% | ||||||||||||||||||||||||||||||||||||
| Expiration term of options granted | 9 years | 7 years | 10 years | 8 years | 9 years | ||||||||||||||||||||||||||||||||
| Number of different vesting schedules | 2 | 3 | 4 | ||||||||||||||||||||||||||||||||||
| Percentage of options vesting on the stated vesting commencement date | 100.00% | 100.00% | 100.00% | ||||||||||||||||||||||||||||||||||
| Percentage of options vesting on the first anniversary of the stated vesting commencement date | 25.00% | 25.00% | 25.00% | 25.00% | 33.00% | ||||||||||||||||||||||||||||||||
| Percentage of options vesting on the second anniversary of the stated vesting commencement date | 50.00% | 25.00% | 25.00% | 33.00% | |||||||||||||||||||||||||||||||||
| Percentage of options vesting on the third anniversary of the stated vesting commencement date | 25.00% | 25.00% | 25.00% | 33.00% | |||||||||||||||||||||||||||||||||
| Percentage of options vesting on the fourth anniversary of the stated vesting commencement date | 25.00% | 25.00% | 25.00% | ||||||||||||||||||||||||||||||||||
| Percentage of options vesting each quarter for the second anniversary of the stated vesting commencement date | 6.25% | 6.25% | |||||||||||||||||||||||||||||||||||
| Percentage of options vesting each quarter for the third anniversary of the stated vesting commencement date | 6.25% | 6.25% | |||||||||||||||||||||||||||||||||||
| Percentage of options vesting each quarter for the fourth anniversary of the stated vesting commencement date | 6.25% | 6.25% | |||||||||||||||||||||||||||||||||||
| Number of share options authorized for accelerated vesting | 800,000 | 800,000 | 2,758,336 | 2,758,336 | |||||||||||||||||||||||||||||||||
| Compensation cost reversed | $ 487,000 | 2,948,000 | |||||||||||||||||||||||||||||||||||
| Fair value of the award on the modification date | 277,000 | 1,676,000 | |||||||||||||||||||||||||||||||||||
| Number of employees for whom accelerated vesting of share options authorized | 2 | 2 | 1 | 1 | |||||||||||||||||||||||||||||||||
| Net incremental stock-based compensation (in CNY or dollars) | 1,776,000 | $ 501,000 | 3,121,300 | ||||||||||||||||||||||||||||||||||
| Exercise price of certain options before modification (in dollars per shares) | $ 0.41 | ||||||||||||||||||||||||||||||||||||
| Exercise price (in dollars per share) | $ 0.24 | ||||||||||||||||||||||||||||||||||||
| Options granted (in shares) | 9,471,008 | 2,130,000 | 25,954,666 | ||||||||||||||||||||||||||||||||||
| Exercise price (in CNY or dollars per share) | $ 0.24 | $ 0.24 | $ 0.24 | $ 0.41 | $ 0.41 | $ 0.41 | |||||||||||||||||||||||||||||||
| Options to purchase ordinary shares, outstanding (in shares) | 37,911,574 | ||||||||||||||||||||||||||||||||||||
| Number of ordinary shares available for future grant | 3,717,467 | ||||||||||||||||||||||||||||||||||||