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LEGAL MATTERS (Details)
$ in Millions
12 Months Ended
Jan. 03, 2017
Aug. 05, 2015
item
Jul. 07, 2015
item
Jun. 18, 2015
item
Mar. 05, 2015
Jan. 21, 2015
item
Mar. 27, 2014
USD ($)
Dec. 31, 2014
Third Paragraph IV Certification Notice from Actavis Member                
LEGAL MATTERS                
Number of patents-in-suit     2          
Second Paragraph IV Certification Notice from Actavis Member                
LEGAL MATTERS                
Number of patents-in-suit           2    
Paragraph IV Certification Notice from Teva Pharmaceuticals Member                
LEGAL MATTERS                
Number of patents-in-suit   2            
Period of stay of FDA approval of ANDA from receipt of certification notice         30 months      
Federal Leave To Amend Claims Member                
LEGAL MATTERS                
Loss Contingency, Claims Dismissed, Number       2        
California Prejudice Claims Member                
LEGAL MATTERS                
Loss Contingency, Claims Dismissed, Number       7        
STENDRA ANDA Litigation member                
LEGAL MATTERS                
Period prior to expiration notice of the last to expire of patents-in-suit 180 days              
Qsymia ANDA Litigation | Actavis Laboratories FL                
LEGAL MATTERS                
Period of stay of FDA approval of ANDA from receipt of certification notice               30 months
Shareholder derivative lawsuit | Minimum | Qsymia                
LEGAL MATTERS                
Amount of damages sought | $             $ 2.8