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STOCK-BASED COMPENSATION (Tables) | 9 Months Ended
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Sep. 30, 2013
STOCK-BASED COMPENSATION |
Schedule of principal assumptions used in applying the Black-Scholes option pricing model for the awards |
|  | Three Months Ended September 30, |  | Nine Months Ended September 30, |
|  | 2013 |  | 2012 |  | 2013 |  | 2012 |
Risk-free interest rate |  | 0.50% to 0.86% |  | — |  | 0.50% |  | 0.97% |
Dividend yield |  | n/a |  | — |  | n/a |  | n/a |
Volatility factor of the expected market price of common stock |  | 66% to 69% |  | — |  | 66% |  | 75% |
Weighted-average expected life of option |  | 3.5 years |  | — |  | 3.5 years |  | 6.0 years |
Weighted-average grant date fair value |  | $1.02 |  | — |  | $1.01 |  | $3.80 |

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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