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RELATED PARTY TRANSACTIONS (Tables)
12 Months Ended
Dec. 31, 2013
RELATED PARTY TRANSACTIONS [Abstract]  
Schedule of Related Party Transactions
    Year ended December 31,  
(U.S. dollars in thousands)   2011     2012     2013  
Compensation to the non-executive directors (includes the interim Chairman of the Board)   $ 215     $ 375     $ 509