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STOCK-BASED COMPENSATION Deferred Compensation Arrangement (Details) (USD $)
 6 Months Ended 12 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Non Employee Members of Scientific Advisory Board [Member]
Dec. 31, 2012
Non Employee Members of Scientific Advisory Board [Member]
Jun. 30, 2014
Director [Member]
Jun. 30, 2013
Director [Member]
Jun. 30, 2014
Director [Member]
Jun. 30, 2013
Director [Member]
Jun. 30, 2014
Restricted Stock and Units [Member]
Jun. 30, 2013
Restricted Stock and Units [Member]
Jun. 30, 2014
Restricted Stock and Units [Member]
Selling, General and Adminstrative Expense [Member]
Jun. 30, 2013
Restricted Stock and Units [Member]
Selling, General and Adminstrative Expense [Member]
Jun. 30, 2014
Restricted Stock and Units [Member]
Selling, General and Adminstrative Expense [Member]
Jun. 30, 2013
Restricted Stock and Units [Member]
Selling, General and Adminstrative Expense [Member]
Jun. 30, 2014
Restricted Stock and Units [Member]
Research and Development Expense [Member]
Jun. 30, 2013
Restricted Stock and Units [Member]
Research and Development Expense [Member]
Jun. 30, 2014
Restricted Stock and Units [Member]
Research and Development Expense [Member]
Jun. 30, 2013
Restricted Stock and Units [Member]
Research and Development Expense [Member]
Jun. 30, 2014
Restricted Stock and Units [Member]
Non Employee Members of Scientific Advisory Board [Member]
Research and Development Expense [Member]
Jun. 30, 2013
Restricted Stock and Units [Member]
Non Employee Members of Scientific Advisory Board [Member]
Research and Development Expense [Member]
Jun. 30, 2014
Restricted Stock and Units [Member]
Non Employee Members of Scientific Advisory Board [Member]
Research and Development Expense [Member]
Jun. 30, 2013
Restricted Stock and Units [Member]
Non Employee Members of Scientific Advisory Board [Member]
Research and Development Expense [Member]
Jun. 30, 2014
Performance Shares [Member]
Jun. 30, 2014
Performance Shares [Member]
Selling, General and Adminstrative Expense [Member]
Jun. 30, 2013
Performance Shares [Member]
Selling, General and Adminstrative Expense [Member]
Jun. 30, 2014
Performance Shares [Member]
Selling, General and Adminstrative Expense [Member]
Jun. 30, 2013
Performance Shares [Member]
Selling, General and Adminstrative Expense [Member]
Jun. 30, 2014
Performance Shares [Member]
Research and Development Expense [Member]
Jun. 30, 2013
Performance Shares [Member]
Research and Development Expense [Member]
Jun. 30, 2014
Performance Shares [Member]
Research and Development Expense [Member]
Jun. 30, 2013
Performance Shares [Member]
Research and Development Expense [Member]
Deferred Compensation Arrangement with Employees and Non Employees, Share Based Payments [Line Items]                                                              
Restricted stock awards and units vesting terms 2 years               3 years                                            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period                 59,027                           36,092                
Compensation expense                     $ 914,000 $ 1,100,000 $ 1,800,000 $ 1,900,000 $ 409,000 $ 417,000 $ 783,000 $ 744,000 $ 57,000 $ 44,000 $ 100,000 $ 130,000   $ 198,000 $ 137,000 $ 685,000 $ 175,000 $ 60,000 $ 42,000 $ 207,000 $ 53,000
Fair value of shares withheld for tax withholding obligations 2,600,000 3,000,000                                                          
Shares withheld for tax withholding obligations (in shares)                 75,314 94,087                                          
Vesting period             1 year                                                
Fair value of shares issued     $ 323,000 $ 300,000 $ 202,000 $ 126,000 $ 363,000 $ 264,000                                              
Deferred Compensation Arrangement with Individual, Shares Issued             11,250 10,000