Note 4 - Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2014
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment [Table Text Block]
   

2014

 
   

Cost

   

Accumulated
Depreciation
and
Amortization

   

Net
Carrying
Value

 
   

(In thousands)

 

Scientific equipment

  $ 2,273     $ (1,429 )   $ 844  

Leasehold improvements

    1,590       (948 )     642  

Computer software and equipment

    414       (327 )     87  

Office equipment

    34       (31 )     3  
    $ 4,311     $ (2,735 )   $ 1,576  
   

2013

 
   

Cost

   

Accumulated
Depreciation
and
Amortization

   

Net
Carrying
Value

 
   

(In thousands)

 

Scientific equipment

  $ 1,985     $ (1,096 )   $ 889  

Leasehold improvements

    1,579       (787 )     792  

Office equipment

    34       (26 )     8  

Computer software and equipment

    325       (319 )     6  
    $ 3,923     $ (2,228 )   $ 1,695