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Note 3 - Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2015
Notes Tables  
Property, Plant and Equipment [Table Text Block]
    2015   2014
Computer and office equipment   $ 335     $ 262  
Furniture and fixtures     132       126  
Land     1,418       1,418  
Leasehold improvements     770       762  
Scientific equipment     5,595       4,648  
Vehicle     30       30  
Construction in process     2,417      
189
 
Building Construction in process
   
10,371
     
885
 
Accumulated depreciation     (4,751 )     (4,207 )
    $
16,317
    $ 4,113