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Note 3 - Acquisitions (Tables)
9 Months Ended
Sep. 30, 2019
Immervision [Member]  
Notes Tables  
Schedule of Business Acquisitions, by Acquisition [Table Text Block]
Intangible assets:
       
Core technologies
  $
10,000
 
Acquisition of Hillcrest Labs [Member]  
Notes Tables  
Schedule of Business Acquisitions, by Acquisition [Table Text Block]
Tangible assets (including inventory, property and equipment and other)
  $
681
 
Intangible assets:
       
Developed technologies
   
2,475
 
Customer relationships
   
3,518
 
Customer backlog
   
72
 
Goodwill
   
4,458
 
Total assets
  $
11,204