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RESTRUCTURING (Details) (USD $)
 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 3 Months Ended
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Employee Severance And Other Benefits
Jun. 30, 2014
Facility Related Charges
Jun. 30, 2013
April 2013 Restructuring
Jun. 30, 2013
April 2013 Restructuring
Dec. 31, 2013
April 2013 Restructuring
Apr. 25, 2013
April 2013 Restructuring
Positions
Jun. 30, 2013
April 2013 Restructuring
One-time termination benefits
Jun. 30, 2013
April 2013 Restructuring
Asset Write Downs
RESTRUCTURING                      
Number of positions eliminated, inception to date                 20    
Restructuring charges $ 838,000   $ 916,000     $ 824,000   $ 1,370,000   $ 624,000 $ 200,000
Stock-based compensation expense related to extension of the post-termination exercise period           28,000 28,000     28,000  
Outstanding restructuring liability                      
Accrual balance at the beginning of the period   94,000   21,000 73,000            
Cash payments   (92,000)   (19,000) (73,000)            
Adjustments or non-cash credits   $ (2,000)   $ (2,000)