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Note 14 Segment Information
 6 Months Ended
Sep. 30, 2012
Segment Reporting [Abstract]  
Segment Reporting Disclosure [Text Block]

14. Segment Information

 

We have a single operating segment. This operating segment is comprised of semiconductor products used primarily in power-related applications. While we have separate legal subsidiaries with discrete financial information, we have one chief operating decision maker with highly integrated businesses. Our net revenues by major geographic area (based on destination) were as follows (in thousands):

  Three Months Ended Six Months Ended
  September 30, September 30,
   2012  2011 2012 2011
             
  (unaudited) (unaudited)
United States$ 20,241 $ 27,562 $ 45,163 $ 55,267
Europe and the Middle East           
 France  1,125   1,915   2,698   3,946
 Germany  7,446   12,888   16,603   26,304
 United Kingdom  6,429   8,430   13,553   16,432
 Other  9,227   13,643   19,477   27,783
Asia Pacific           
 China  10,586   16,971   23,970   35,536
 Japan  1,717   2,607   3,545   4,695
 Korea  2,082   3,004   4,325   6,949
 Malaysia  1,146   1,036   2,449   2,156
 Singapore  2,509   3,101   5,154   5,585
 Taiwan  1,253   1,765   2,477   3,997
 Other  1,319   1,717   2,674   3,086
Rest of the World           
 India  1,470   2,425   3,272   5,254
 Other  1,911   1,940   3,958   3,792
Total$ 68,461 $ 99,004 $ 149,318 $ 200,782

The following table sets forth net revenues for each of our product groups for the three and six months ended September 30, 2012 and 2011 (in thousands):

 

 Three Months Ended September 30, Six Months Ended September 30,
  2012  2011  2012  2011
            
  (unaudited)  (unaudited)
Power semiconductors$ 48,203 $ 74,731 $ 107,785 $ 151,195
Integrated circuits  15,100   16,949   30,699   35,060
Systems and RF power semiconductors  5,158   7,324   10,834   14,527
Total$ 68,461 $ 99,004 $ 149,318 $ 200,782

For the three and six months ended September 30, 2012, one distributor accounted for 14.1% and 13.2% of our net revenues, respectively, and another distributor accounted for 10.0% and 10.9% of our net revenues, respectively. For the three and six months ended September 30, 2011, one distributor accounted for 11.8% and 12.3% of our net revenues, respectively, and another distributor accounted for 11.2% and 11.1% of our net revenues, respectively.