CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 12 Months Ended 147 Months Ended 150 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Mar. 31, 2013
Operating costs and expenses:            
Research and development, net $ 522 $ 369 $ 1,770 $ 1,689 $ 26,189 [1] $ 26,711 [1]
General and administrative 559 510 1,748 2,205 18,751 [1] 19,310 [1]
Total operating costs and expenses 1,081 879 3,518 3,894 44,940 [1] 46,021 [1]
Financial expense (income), net 1 (11) (93) 151 2,454 [1] 2,455 [1]
Other income 0 0 0 (132) (132) [1] (132) [1]
Operating loss 1,082 868 3,425 3,913 47,262 [1] 48,344 [1]
Taxes on income 0 4 5 5 82 [1] 82 [1]
Loss from continuing operations 1,082 872 3,430 3,918 47,344 [1] 48,426 [1]
Net loss from discontinued operations 0 0 0 0 164 [1],[2] 164 [1],[2]
Net loss $ 1,082 $ 872 $ 3,430 $ 3,918 $ 47,508 [1],[2] $ 48,590 [1],[2]
Basic and diluted net loss per share from continuing operations (in dollars per share) $ 0.01 $ 0.01 $ 0.02 $ 0.03 $ 0 [1]  
Weighted average number of shares outstanding used in computing basic and diluted net loss per share (in shares) 150,953,117 126,591,262 137,596,391 120,117,724 0 [1]  
[1] Out of which, $163, relating to the period from inception to March 31 2004, is unaudited.
[2] Out of the which, cash flows used in discontinued operating activities of $36, cash flows used in discontinued investing activities of $16 and cash flows provided in discontinued financing activities of $57, relating to the period from inception to March 31, 2004, is unaudited.