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CONVERTIBLE DEBT (Schedule of Changes of Long-term Convertible Debt) (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
CONVERTIBLE DEBT [Abstract]    
Balance as of January 1, 2016 $ 35,926  
Change in accrued interest 835  
Change in fair value 1,120 $ 1,780
Payment of interest (952)  
Payment of principal (7,620)
Balance as of June 30, 2016 [1] 29,309  
Convertible Debt [Member]    
CONVERTIBLE DEBT [Abstract]    
Accrued interest $ 372  
[1] Includes accrued interest of $372