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STOCKHOLDERS' EQUITY AND SHARE-BASED COMPENSATION EXPENSE, Stock Options (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]        
Risk free interest rate 1.40% 0.60% 1.00% 0.60%
Expected dividend yield 0.00% 0.00% 0.00% 0.00%
Expected volatility 68.00% 67.00% 68.00% 67.00%
Expected option term (in years) 4 years 7 months 6 days 4 years 7 months 6 days 4 years 7 months 6 days 4 years 7 months 6 days
Term of historical trend     10 years  
Weighted average grant date fair value of options granted (in dollars per share) $ 2.90 $ 2.11 $ 2.24 $ 2.19