Organization and Summary of Significant Accounting Policies - Summary of Revenue as Percentage of Total Revenue for Each Significant Customer, or Distributor, and Significant End-Customer (Details) - Sales Revenue, Net - Customer Concentration Risk	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Customer A
Product Information [Line Items]
Concentration risk, percentage	70.00%	79.00%	76.00%	73.00%
End-Customer A
Product Information [Line Items]
Concentration risk, percentage	59.00%	59.00%	62.00%	60.00%