CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
REVENUES	$ 2,264	$ 26,113	$ 5,832	$ 29,974
COMPANY'S SHARE IN COLLABORATION AGREEMENT	800	(855)	1,200	(988)
COST OF REVENUES	(1,318)	(3,279)	(2,289)	(4,599)
GROSS PROFIT	1,746	21,979	4,743	24,387
RESEARCH AND DEVELOPMENT EXPENSES	(7,990)	(10,544)	(15,744)	(19,391)
Less - grants and reimbursements	1,532	1,689	3,963	3,692
RESEARCH AND DEVELOPMENT EXPENSES, NET	(6,458)	(8,855)	(11,781)	(15,699)
GENERAL AND ADMINISTRATIVE EXPENSES	(2,182)	(3,504)	(4,285)	(5,133)
OPERATING PROFIT (LOSS)	(6,894)	9,620	(11,323)	3,555
FINANCIAL INCOME - NET	57	22	165	183
NET PROFIT (LOSS) FOR THE PERIOD	$ (6,837)	$ 9,642	$ (11,158)	$ 3,738
EARNINGS (LOSS) PER SHARE OF COMMON STOCK:
BASIC	$ (0.07)	$ 0.11	$ (0.12)	$ 0.04
DILUTED	$ (0.07)	$ 0.10	$ (0.12)	$ 0.04
WEIGHTED AVERAGE NUMBER OF SHARES OF COMMON STOCK USED IN COMPUTING EARNING (LOSS) PER SHARE:
BASIC	92,297,522	91,526,224	92,241,505	89,702,496
DILUTED	92,297,522	94,881,167	92,241,505	92,670,033