LOSS PER SHARE (Details 2)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Denominator:    
Anti-dilutive potential common equivalent shares excluded from calculation of net (loss) income per share 10,937 11,105
Stock options    
Denominator:    
Anti-dilutive potential common equivalent shares excluded from calculation of net (loss) income per share 8,731 9,342
Restricted stock units    
Denominator:    
Anti-dilutive potential common equivalent shares excluded from calculation of net (loss) income per share 2,206 1,763