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NET INCOME (LOSS) PER COMMON SHARE (Policies)
3 Months Ended
Mar. 31, 2012
NET INCOME (LOSS) PER COMMON SHARE [Abstract]  
Net Income (Loss) Per Common Share
Basic net loss per common share is computed by dividing the net loss by the weighted-average number of shares of common stock outstanding for the period, excluding unvested restricted stock awards.  Diluted net loss per common share reflects the potential dilution from the exercise or conversion of securities into common stock, the effect of unvested restricted stock awards and restricted stock units, and the impact of shares to be issued under the ESPP.