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Major Customers Accounted for at Least 10% of Net Accounts Receivable Balances (Details)	Jun. 30, 2018	Dec. 31, 2017
Ingram Micro, Inc.
Percent of net accounts receivable balances	38.00%	37.00%
Threshold percentage for disclosure	10.00%	10.00%
BlueStar, Inc.
Percent of net accounts receivable balances	32.00%	23.00%
Threshold percentage for disclosure	10.00%	10.00%
ScanSource, Inc.
Percent of net accounts receivable balances		10.00%
Threshold percentage for disclosure	10.00%	10.00%
Ingram Micro Pan Europe GmbH
Percent of net accounts receivable balances		10.00%
Threshold percentage for disclosure	10.00%	10.00%

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