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Segment Information and Concentrations (Tables)
 3 Months Ended
Jun. 30, 2013
Notes to Financial Statements  
Revenue by geographic areas
  

Three Months Ended

June 30,

 

Six Months Ended

June 30,

   2013  2012  2013  2012
Revenues:                    
   United States  $3,226,442   $2,255,519   $5,804,072   $4,478,578 
   Europe   611,185    1,160,557    1,484,332    2,390,052 
   Asia and rest of world   597,804    621,426    1,412,202    1,122,631 
      Total revenues  $4,435,431  $4,037,502  $8,700,606  $7,991,261
Major customers accounted for at least 10% of total revenues
  

Three Months Ended

June 30,

 

Six Months Ended

June 30,

   2013  2012  2013  2012
Ingram Micro Inc.   19%   19%   18%   17%
ScanSource, Inc.   21%   18%   20%   20%
BlueStar, Inc.   15%   *    12%   * 
CF Company   *    *    11%   * 
Major customers as a percentage of net accounts receivable balances
   June 30,  December 31,
   2013  2012
Company A    29%   28%
Company B    19%   12%
Company C    13%   16%
Company D    *    11%
Company E    *    12%