Balance Sheet Details - Allowance and Product Return Reserve (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance At Beginning of Year	$ 241	$ 358	$ 421
Additions Charged to Cost or Expense or Revenue	405	154	(13)
Deductions and Write Offs	(145)	(271)	(50)
Balance At End of Year	501	241	358
Product return reserve
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance At Beginning of Year	508	764	1,740
Additions Charged to Cost or Expense or Revenue	4,224	4,805	3,535
Deductions and Write Offs	(4,069)	(5,061)	(4,511)
Balance At End of Year	$ 663	$ 508	$ 764