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Major Customers Accounted for at Least 10% of Net Accounts Receivable Balances (Details)
Mar. 31, 2017
Dec. 31, 2016
Ingram Micro, Inc.    
Percent of net accounts receivable balances 59.00% 49.00%
Threshold percentage for disclosure 10.00% 10.00%
BlueStar, Inc.    
Percent of net accounts receivable balances 18.00% 30.00%
Threshold percentage for disclosure 10.00% 10.00%
ScanSource, Inc.    
Percent of net accounts receivable balances 11.00%  
Threshold percentage for disclosure 10.00% 10.00%