Note 12 - Segment and Geographical Information (Tables)
 3 Months Ended
Apr. 29, 2017
Notes Tables  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
 
 
Three Months Ended
 
 
 
April 29, 2017
 
 
April 30, 2016
 
                 
Connected Smart TV Platforms
   $
27,890
     $
43,708
  
IoT Devices
    
11,674
      
9,917
  
License and other
    
-
      
150
  
Net revenue
   $
39,564
     $
53,775
  
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]
 
 
Three Months Ended
 
 
 
April 29
, 201
7
 
 
April 30
, 201
6
 
Asia
  $
31,922
     $
46,041
  
North America
    
5,819
      
6,615
  
Europe
    
1,823
      
1,119
  
Net revenue
   $
39,564
     $
53,775
  
Geographic Concentration Risk [Member]  
Notes Tables  
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]
 
 
Three Months Ended
 
 
 
April 29, 2017
 
 
April 30, 2016
 
                 
China, including Hong Kong
   $
21,790
     $
27,457
  
Taiwan
    
6,951
      
13,964
  
United States
    
5,520
      
6,589
  
Republic of Korea
    
1,675
      
1,511
  
Rest of the world
    
3,628
      
4,254
  
Net revenue
   $
39,564
     $
53,775