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Major Customers as a Percentage of Net Accounts Receivable Balances (Details)
Dec. 31, 2016
Dec. 31, 2015
Ingram Micro Inc.    
Percent of net accounts receivable balances 49.00% 35.00%
Threshold percentage for disclosure 10.00% 10.00%
BlueStar, Inc.    
Percent of net accounts receivable balances 30.00% 22.00%
Threshold percentage for disclosure 10.00% 10.00%
ScanSource, Inc.    
Percent of net accounts receivable balances 17.00%
Threshold percentage for disclosure 10.00% 10.00%