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STOCKHOLDERS' EQUITY AND SHARE-BASED COMPENSATION EXPENSE - Convertible Preferred Stock Narrative (Details) - $ / shares
Dec. 31, 2015
Dec. 31, 2014
Stockholders Equity And Share Based Compensation Expense [Abstract]    
Convertible preferred stock, shares authorized (in share) 5,000,000 5,000,000
Convertible preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Convertible stock, shares issued (in shares) 0 0
Convertible preferred stock, shares outstanding (in shares) 0 0