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STOCKHOLDERS' EQUITY AND SHARE-BASED COMPENSATION EXPENSE, Stock Options (Details) (USD $)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Fair value of options estimated at the date of grant with weighted average assumptions [Abstract]    
Risk free interest rate (in hundredths) 0.80% 1.00%
Expected dividend yield (in hundredths) 0.00% 0.00%
Expected volatility (in hundredths) 68.00% 67.00%
Expected option term (in years) 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) $ 2.09 $ 2.38