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FAIR VALUE MEASUREMENTS (Schedule Of Fair Value Measurements) (Details) (USD $)
6 Months Ended 12 Months Ended
Jun. 30, 2013
Dec. 31, 2012
FAIR VALUE MEASUREMENTS [Abstract]    
Fair value of embedded derivatives $ 6,864,000 $ 5,707,000
Fair value of Exchange Option within second research and development arrangement 4,756,000 569,000
Change in fair value of Exchange Option and embedded derivatives within research and development arrangements (467,000) 588,000
Fair value of embedded derivatives 11,153,000 6,864,000
Cash consideration included in research and development funding arrangements 884,000 744,000
Fair value of liability with respect to outstanding options to non-employee $ 0 $ 264,000