PROPERTY AND EQUIPMENT (Tables)
 12 Months Ended
Dec. 31, 2012
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment [Table Text Block]
  December 31, 
  2 0 1 2  2 0 1 1 
  U.S. $ in thousands 
       
Cost:        
  Office furniture and equipment  9   9 
  Computer software and electronic equipment  120   106 
  Laboratory equipment  437   361 
  Leasehold improvements  690   690 
   1,256   1,166 
Accumulated depreciation:        
  Office furniture and equipment  4   4 
  Computer software and electronic equipment  106   103 
  Laboratory equipment  306   252 
  Leasehold improvements  593   493 
   1,009   852 
         
Depreciated cost  247   314