Commitments and Contingencies - Restructuring Activities and Sale of Guangzhou Factory (Details) $ in Thousands, ¥ in Millions		3 Months Ended
	Sep. 26, 2016 USD ($)	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)	Sep. 26, 2016 CNY (¥)
Restructuring Cost and Reserve [Line Items]
Factory transition restructuring charges		$ 5,250	$ 1,433
Guangzhou Factory | Disposed of by sale
Restructuring Cost and Reserve [Line Items]
Consideration	$ 46,000			¥ 320
Period to cease operations (up to)	24 months
Expected term of completion	28 months
Escrow deposit as percentage of purchase price	10.00%			10.00%
Employee severance | Manufacturing activities transition
Restructuring Cost and Reserve [Line Items]
Additional restructuring expenses expected to be incurred		2,000
Employee severance | Manufacturing activities transition | Accrued compensation
Restructuring Cost and Reserve [Line Items]
Unpaid severance costs		200
Employee severance | Manufacturing activities transition | Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Factory transition restructuring charges		$ 5,300	$ 1,400