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RESEARCH AND LICENSE AGREEMENTS WITH PRINCETON UNIVERSITY, UNIVERSITY OF SOUTHERN CALIFORNIA AND THE UNIVERSITY OF MICHIGAN (Details) - USD ($)
 3 Months Ended 9 Months Ended 13 Months Ended 32 Months Ended 36 Months Ended 48 Months Ended 120 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Jun. 30, 2014
Dec. 31, 2011
Apr. 30, 2009
Apr. 30, 2013
Jul. 31, 2007
Research and Development Arrangement, Contract to Perform for Others [Line Items]                  
Royalty expense $ 1,105,000 $ 803,000 $ 3,563,000 $ 3,060,000          
1997 Research Agreement [Member]                  
Research and Development Arrangement, Contract to Perform for Others [Line Items]                  
Term of agreement (in years)                 10 years
2006 Research Agreement - Original Term [Member]                  
Research and Development Arrangement, Contract to Perform for Others [Line Items]                  
Term of agreement (in years)             3 years 4 years  
Research and development expense incurred             $ 5,000,000    
2006 Research Agreement - Extended Term [Member]                  
Research and Development Arrangement, Contract to Perform for Others [Line Items]                  
Term of agreement (in years)           4 years      
Research and development expense incurred         $ 2,800,000        
Maximum obligation 3,700,000   $ 3,700,000            
1997 Amended License Agreement [Member]                  
Research and Development Arrangement, Contract to Perform for Others [Line Items]                  
Royalty rate for licensed products sold by the Company (in hundredths)     3.00%            
Royalty rate for licensed products sold by the Company's sublicenses (in hundredths)     3.00%            
Minimum royalty payment per year     $ 100,000            
Royalty expense $ 1,100,000 $ 770,000 3,600,000 $ 3,000,000          
Minimum investment per year     $ 800,000