Balance Sheet Details - Deferred Revenue (Details) - USD ($) $ in Thousands	Apr. 01, 2017	Dec. 31, 2016
Deferred Revenue Arrangement [Line Items]
Deferred revenue, current	$ 44,416	$ 27,854
Deferred revenue, noncurrent	20,876	20,237
Deferred revenue	65,292	48,091
Revenue Contract
Deferred Revenue Arrangement [Line Items]
Deferred revenue	21,500	20,300
Product and services
Deferred Revenue Arrangement [Line Items]
Deferred revenue, current	41,152	24,472
Deferred revenue, noncurrent	38	22
Extended warranty
Deferred Revenue Arrangement [Line Items]
Deferred revenue, current	3,264	3,382
Deferred revenue, noncurrent	$ 20,838	$ 20,215