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Note 8 - Customer and Geographic Information (Tables)
3 Months Ended
Mar. 31, 2014
Segment Reporting [Abstract]  
Disclosure on Geographic Areas, Description of Revenue from External Customers
   

Three Months

 

Ended March 31,

 

Customer

 

2014

   

2013

 

A

    45

%

    33

%

B

    19

%

    16

%

C

    13

%

    25

%

Disclosure on Geographic Areas, Long-Lived Assets

Customer

 

March 31, 2014

   

December 31, 2013

 

A

    37

%

    33

%

B

    23

%

    12

%

C

    14

%

    26

%

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]
   

Three Months Ended March 31,

 
   

2014

   

2013

 
   

Revenues

   

Percentage of

Revenues

   

Revenues

   

Percentage of

Revenues

 

North America

  $ 11,399       42

%

  $ 9,866       41

%

Germany

    9,100       34       4,625       19  

South Korea

    2,260       8       4,912       21  

Japan

    1,713       6       2,261       9  

Rest of Asia

    1,495       6       1,544       6  

Rest of Europe

    1,119       4       902       4  

Total revenue

  $ 27,086       100

%

  $ 24,110       100

%

Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block]
   

March 31,

2014

   

December 31,

2013

 

North America

  $ 7,102     $ 6,578  

Asia

    354       364  

Europe

    126       122  

Total long-lived assets, net

  $ 7,582     $ 7,064