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Segment Information and Concentrations - Major customers accounted for at least 10% of total revenues (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Ingram Micro Inc.
       
Percent of total revenues 19.00% 19.00% 18.00% 17.00%
Threshold percentage for disclosure 10.00% 10.00% 10.00% 10.00%
Scansource, Inc.
       
Percent of total revenues 21.00% 18.00% 20.00% 20.00%
Threshold percentage for disclosure 10.00% 10.00% 10.00% 10.00%
BlueStar, Inc.
       
Percent of total revenues 15.00%    12.00%   
Threshold percentage for disclosure 10.00% 10.00% 10.00% 10.00%
CF Company, Inc.
       
Percent of total revenues       11.00%   
Threshold percentage for disclosure 10.00% 10.00% 10.00% 10.00%