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Note 3 - Segments (Tables)
12 Months Ended
Dec. 31, 2015
Notes Tables  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
   
Year Ended December 31,
 
   
2015
   
2014
   
2013
 
Infrastructure
  $ 42,176     $ 39,161     $ 36,199  
Mobile
    16,476       47,121       98,043  
Total
  $ 58,652     $ 86,282     $ 134,242  
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]
   
Year Ended December 31,
 
   
2015
   
2014
   
2013
 
Asia
  $ 47,149     $ 77,954     $ 125,027  
Europe
    1,380       1,458       1,680  
Latin America
    4,939       5,128       5,669  
USA
    5,184       1,742       1,866  
Total
  $ 58,652     $ 86,282     $ 134,242