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SHARE-BASED COMPENSATION (Tables)
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12 Months Ended |
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Dec. 31, 2012
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| SHARE-BASED COMPENSATION [Abstract] |
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| Schedule of Assumptions Used to Estimate Fair Value |
| Year ended December 31 | | 2011 | | 2012 | | | | | | | | Risk-free interest rate (1) | | 0.11% - 2.66% | | 0.11% - 2.66% | | Expected life (2) | | 2-5 years | | 2-5 years | | Expected volatility (3) | | 42.04%- 48.30% | | 39.97%-42.04% | | Dividend yield (4) | | Nil | | Nil | | | (1) | Risk-free interest rate | Risk-free interest rate adopted the yield to maturity of United States government bonds with the same maturity as the respective expected term of the options. The expected life was estimated as the average between the vesting term of the options and the original contractual term. The expected volatility of the underlying ADS during the life of the options was calculated based on the Company's historical stock price volatility over the period from initial public offering through to the grant date. The dividend yield was expected to be nil based on the Company's historical dividend distribution record and its policy. The fair value of the ordinary shares on the grant date was the closing price of the Company's stock at each grant date. |
| Summary of Stock Options Activity |
| | | | | | Weighted | | | Weighted | | | | | | | | average | | | average | | | | | Number | | | exercise price | | | fair value | | | | | of options | | | per option | | | at grant date | | | | | | | | | | | | | | Outstanding at December 31, 2010 | | | 6,962,675 | | | $ | 1.40 | | | $ | 1.22 | | | Granted on January 25, 2011 | | | 27,000 | | | $ | 1.40 | | | $ | 1.13 | | | Granted on December 15, 2010 but effective on May 10, 2011 (note) | | | 812,700 | | | $ | 1.40 | | | $ | 1.12 | | | Granted on May 10, 2011 | | | 274,000 | | | $ | 1.40 | | | $ | 1.12 | | | Granted on August 9, 2011 | | | 532,100 | | | $ | 1.40 | | | $ | 0.79 | | | Granted on November 8, 2011 | | | 15,000 | | | $ | 1.40 | | | $ | 0.91 | | | Exercised | | | (479,196 | ) | | $ | 1.40 | | | $ | 1.22 | | | Forfeited | | | (777,280 | ) | | $ | 1.40 | | | $ | 1.22 | | | Expired | | | (10,750 | ) | | $ | 1.40 | | | $ | 1.22 | | | Outstanding at December 31, 2011 | | | 7,356,249 | | | $ | 1.40 | | | $ | 1.01 | | | Exercised | | | (1,635,252 | ) | | $ | 1.40 | | | $ | 1.01 | | | Forfeited | | | (751,425 | ) | | $ | 1.40 | | | $ | 1.01 | | | Expired | | | (91,475 | ) | | $ | 1.40 | | | $ | 1.01 | | | Outstanding at December 31, 2012 | | | 4,878,097 | | | $ | 1.40 | | | $ | 1.01 | | Note: The stock options were approved by the shareholder and Board of Directors on May 10, 2011. |
| Summary of Stock Options Outstanding |
| | | | | | | | | | | | | | | Options exercisable | | | | | Options outstanding as of December 31, 2011 | | | as of December 31, 2011 | | | | | | | | | | | Weighted | | | | | | | | | Weighted | | | | | | | | | | | Weighted | | | average | | | | | | | | | average | | | | | | | | | | | average | | | exercise | | | Aggregate | | | Number | | | exercise | | | Aggregate | | | | | Number | | | contractual | | | price | | | intrinsic | | | of | | | price | | | intrinsic | | | | | of option | | | period | | | per option | | | value | | | options | | | per option | | | value | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Ordinary shares | | | 7,356,249 | | | | 5 years | | | $ | 1.40 | | | $ | 8,984 | | | | 2,195,234 | | | $ | 1.40 | | | $ | 2,106 | | | | | | | | | | | | | | | | | Options exercisable | | | | | Options outstanding as of December 31, 2012 | | | as of December 31, 2012 | | | | | | | | | | | Weighted | | | | | | | | | Weighted | | | | | | | | | | | Weighted | | | average | | | | | | | | | average | | | | | | | | | | | average | | | exercise | | | Aggregate | | | Number | | | exercise | | | Aggregate | | | | | Number | | | contractual | | | price | | | intrinsic | | | of | | | price | | | intrinsic | | | | | of option | | | period | | | per option | | | value | | | options | | | per option | | | value | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Ordinary shares | | | 4,878,097 | | | | 5 years | | | $ | 1.40 | | | $ | 17,957 | | | | 2,839,857 | | | $ | 1.40 | | | $ | 2,507 | | |
| Schedule of RSU Activity |
| | | For the year ended | | | | | December 31, 2012 | | | | | | | | Weighted | | | | | | | | average | | | | | Number | | | fair value | | | | | of options | | | at grant date | | | | | | | | | | | Outstanding at December 31, 2010 | | | - | | | $ | - | | | Granted on December 15, 2010 but effective on May 10, 2011 (note) | | | 183,000 | | | $ | 2.36 | | | Granted on May 10, 2011 | | | 12,000 | | | $ | 2.36 | | | Granted on August 9, 2011 | | | 48,000 | | | $ | 1.98 | | | Forfeited | | | (9,000 | ) | | $ | 2.36 | | | Outstanding at December 31, 2011 | | | 234,000 | | | $ | 2.28 | | | Granted on January 17, 2012 | | | 100,000 | | | $ | 1.87 | | | Granted on May 8, 2012 | | | 313,250 | | | $ | 1.69 | | | Exercised | | | (31,500 | ) | | $ | 2.28 | | | Forfeited | | | (34,100 | ) | | $ | 2.28 | | | Outstanding at December 31, 2012 | | | 581,650 | | | $ | 1.93 | | Note: The RSU were approved by the shareholder and Board of Directors on May 10, 2011. |