CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
REVENUES	$ 2,284	$ 3,724	$ 8,116	$ 33,698
COMPANY'S SHARE IN COLLABORATION AGREEMENT	1,075	1,666	2,275	678
COST OF REVENUES	(1,587)	(2,367)	(3,876)	(6,966)
GROSS PROFIT	1,772	3,023	6,515	27,410
RESEARCH AND DEVELOPMENT EXPENSES	(7,723)	(8,326)	(23,467)	(27,717)
Less - grants and reimbursements	2,086	1,963	6,049	5,655
RESEARCH AND DEVELOPMENT EXPENSES, NET	(5,637)	(6,363)	(17,418)	(22,062)
GENERAL AND ADMINISTRATIVE EXPENSES	(1,780)	(2,220)	(6,065)	(7,353)
OPERATING LOSS	(5,645)	(5,560)	(16,968)	(2,005)
FINANCIAL INCOME (EXPENSES) - NET	(102)	81	63	264
NET LOSS FOR THE PERIOD	$ (5,747)	$ (5,479)	$ (16,905)	$ (1,741)
LOSS PER SHARE OF COMMON STOCK:
BASIC AND DILUTED	$ 0.06	$ 0.06	$ 0.18	$ 0.02
WEIGHTED AVERAGE NUMBER OF SHARES OF COMMON STOCK USED IN COMPUTING LOSS PER SHARE:
BASIC AND DILUTED	92,433,502	91,929,445	92,307,170	90,491,421