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STOCKHOLDERS’ EQUITY Activity under the entity's 2005 Stock Plan (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Options exercised, Number of Options   0
Employee Stock Option [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Balances, December 31, 2013, Available for Grant 21,245  
Balances, December 31, 2013, Number of Options 3,635  
Balances, December 31, 2013, Weighted Average Exercise Price per Share $ 4.50  
Options cancelled/expired/forfeited, Number of Options (2)  
Options cancelled/expired/forfeited, Weighted Average Exercise Price per Share $ 6.02  
Options exercised, Number of Options (322)  
Options exercised, Weighted Average Exercise Price $ 4.30  
Balances, March 31, 2014, Number of Options 3,311  
Balances, March 31, 2014, Weighted Average Exercise Price per Share $ 4.52  
Restricted Stock Units R S U Non Performance Based [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Restricted stock units issued (201)  
Plan adjustment for restricted stock units issued 115  
Restricted Stock Units (RSUs) [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Plan adjustment for restricted stock units issued 134  
Stock units cancelled in the period (in shares) 211  
Balances, March 31, 2014, Available for Grant 21,352  
Performance-based Restricted Stock Unites (RSUs) [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Stock units cancelled in the period (in shares) 47  
Performance-based Restricted Stock Units (RSUs) Cancelled [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Plan adjustment for restricted stock units issued 29  
Performance Shares [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Restricted stock units issued   (1,000)
Plan adjustment for restricted stock units issued 2  
Range of Exercise Price: $2.13-$10.01 | Employee Stock Option [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Balances, December 31, 2013, Exercise Price per Share, Maximum   $ 10.01
Balances, December 31, 2013, Exercise Price per Share, Minimum   $ 2.13
Balances, March 31, 2014, Exercise Price per Share, Maximum   $ 10.01
Balances, March 31, 2014, Exercise Price per Share, Minimum   $ 2.13
Range of Exercise Price: $2.13-$10.01 | Employee Stock Option [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Balances, December 31, 2013, Exercise Price per Share, Maximum $ 10.01  
Balances, December 31, 2013, Exercise Price per Share, Minimum $ 2.13  
Balances, March 31, 2014, Exercise Price per Share, Maximum $ 10.01  
Balances, March 31, 2014, Exercise Price per Share, Minimum $ 2.13  
Range of Exercise Price: $4.92-$7.25 | Employee Stock Option [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Balances, December 31, 2013, Exercise Price per Share, Maximum $ 7.25  
Balances, December 31, 2013, Exercise Price per Share, Minimum $ 4.92  
Balances, March 31, 2014, Exercise Price per Share, Maximum $ 7.25  
Balances, March 31, 2014, Exercise Price per Share, Minimum $ 4.92  
Range of Exercise Price: $2.65-$7.38 | Employee Stock Option [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Balances, December 31, 2013, Exercise Price per Share, Maximum $ 7.38  
Balances, December 31, 2013, Exercise Price per Share, Minimum $ 2.65  
Balances, March 31, 2014, Exercise Price per Share, Maximum $ 7.38  
Balances, March 31, 2014, Exercise Price per Share, Minimum $ 2.65