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Segment Information and Concentrations (Tables)
6 Months Ended
Jun. 30, 2012
Notes to Financial Statements  
Revenues by geographic areas
   Three Months Ended
June 30,
  Six Months Ended
June 30,
   2012  2011  2012  2011
Revenues:                    
  United States  $2,255,519   $2,902,614   $4,478,578   $5,827,059 
  Europe   1,160,557    1,104,711    2,390,052    1,978,880 
  Asia and rest of world   621,426    345,286    1,122,631    586,114 
     Total revenues  $4,037,502   $4,352,611   $7,991,261   $8,392,053 
Major customers
   Three Months Ended
June 30,
  Six Months Ended
June 30,
   2012  2011  2012  2011
Ingram Micro Inc.   19%   13%   17%   15%
ScanSource, Inc.   18%   14%   20%   12%
Epocal Inc.   *    11%   *    16%
Schedule of major customers as a percentage of net accounts receivable
   June 30,  December 31,
   2012  2011
Company A   33%   11%
Company B   20%   * 
Company C   13%   10%
Company D   *    33%