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