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
	Mar. 31, 2019	Mar. 31, 2018
Customer A
Product Information [Line Items]
Concentration risk, percentage	64.00%	84.00%
End-Customer A
Product Information [Line Items]
Concentration risk, percentage	35.00%	67.00%
End-Customer B
Product Information [Line Items]
Concentration risk, percentage	23.00%