v3.8.0.1
Note 6 - Collaboration Agreement (Tables)
 12 Months Ended
Dec. 31, 2017
Notes Tables  
Revenue Recognition Amended Agreements [Table Text Block]
   
Years Ended December
31,
  
   
201
7
    
201
6
    
2015
  
License
   $
—
     $
—
     $
13,167
  
Product sales
    
6,673
      
5,742
      
—
  
Joint steering committee, research and development services and demonstration devices
    
269
      
688
      
1,690
  
Non-cash royalty revenue related to Royalty Monetization
(See Note 8)
    
151
      
7
      
—
  
Royalty revenue
    
50
      
3
      
—
  
Total
   $
7,143
     $
6,440
     $
14,857