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STOCKHOLDERS' EQUITY (Details 3) (USD $)
 12 Months Ended
Dec. 31, 2013
$1.10 - $1.50
  
Exercise Price Range  
Exercise price, low end of range (in dollars per share) $ 1.10
Exercise price, high end of range (in dollars per share) $ 1.50
Options Outstanding  
Number of Shares 4,627,834
Weighted Average Exercise Price Per Share (in dollars per share) $ 1.42
Weighted Average Remaining Contractual Life (In years) 8 years 6 months 25 days
$1.51 - $1.70
  
Exercise Price Range  
Exercise price, low end of range (in dollars per share) $ 1.51
Exercise price, high end of range (in dollars per share) $ 1.70
Options Outstanding  
Number of Shares 4,217,041
Weighted Average Exercise Price Per Share (in dollars per share) $ 1.54
Weighted Average Remaining Contractual Life (In years) 9 years 14 days
$1.71 - $6.39
  
Exercise Price Range  
Exercise price, low end of range (in dollars per share) $ 1.71
Exercise price, high end of range (in dollars per share) $ 6.39
Options Outstanding  
Number of Shares 4,067,162
Weighted Average Exercise Price Per Share (in dollars per share) $ 3.78
Weighted Average Remaining Contractual Life (In years) 6 years 1 month 28 days
$6.40 - $9.32
  
Exercise Price Range  
Exercise price, low end of range (in dollars per share) $ 6.40
Exercise price, high end of range (in dollars per share) $ 9.32
Options Outstanding  
Number of Shares 2,664,179
Weighted Average Exercise Price Per Share (in dollars per share) $ 7.08
Weighted Average Remaining Contractual Life (In years) 1 year 4 months 6 days
$1.10 - $9.32
  
Exercise Price Range  
Exercise price, low end of range (in dollars per share) $ 1.10
Exercise price, high end of range (in dollars per share) $ 9.32
Options Outstanding  
Number of Shares 15,576,216
Weighted Average Exercise Price Per Share (in dollars per share) $ 3.04
Weighted Average Remaining Contractual Life (In years) 6 years 9 months 29 days