Balance Sheet Components (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Inventories:
Raw materials	$ 18,342	$ 11,582
Work in process	6,611	1,653
Finished goods	48,767	33,359
Total inventories	73,720	46,594
Property and equipment:
Equipment	55,625	43,533
Furniture and fixtures	5,938	5,897
Leasehold improvements	9,502	9,063
Software	33,508	30,693
Construction in progress	5,931	3,651
Property and equipment, gross	110,504	92,837
Accumulated depreciation and amortization	(70,001)	(60,528)
Total property and equipment, net	40,503	32,309
Other long term assets:
Capitalized software, net	29,206	26,011
Other assets	1,527	1,883
Total other long term assets, net	30,733	27,894
Accrued liabilities:
Advance payments from customers	7,631	8,327
Rebates and lease buyouts	4,163	4,702
Group purchasing organization fees	2,855	2,983
Taxes payable	3,617	2,768
Other accrued liabilities	14,408	11,353
Total accrued liabilities	$ 32,674	$ 30,133