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Business Segments, Concentration of Credit Risk and Significant Customers - Schedule of Customers Who Accounted for at Least 10% of Total Net Revenue (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Customer A
Significant Customers
Percentage of concentration risk	37.00%	43.00%	34.00%	44.00%
Customer B
Significant Customers
Percentage of concentration risk	29.00%	24.00%	15.00%	15.00%
Customer C
Significant Customers
Percentage of concentration risk		15.00%	17.00%	15.00%
Customer D
Significant Customers
Percentage of concentration risk			18.00%

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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