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Summary of Significant Accounting Policies - Major customers accounted for at least 10% of total revenues (Details)	1 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Ingram Micro Inc.
Percent of total revenues	17.00%	13.00%	14.00%
Threshold percentage for disclosure	10.00%	10.00%	10.00%
Scansource, Inc.
Percent of total revenues	21.00%	16.00%
Threshold percentage for disclosure	10.00%	10.00%	10.00%
Bluestar, Inc.
Percent of total revenues	10.00%		11.00%
Threshold percentage for disclosure	10.00%	10.00%	10.00%
Epocal, Inc.
Percent of total revenues		11.00%	10.00%
Threshold percentage for disclosure	10.00%	10.00%	10.00%
Tech Data Corporation
Percent of total revenues			13.00%
Threshold percentage for disclosure	10.00%	10.00%	10.00%

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- Definition

No authoritative reference available.

+ References

No definition available.

+ Details

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- Definition

Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues.

+ References

No definition available.

+ Details

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