Balance Sheet Components (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Inventories:
Raw materials	$ 17,623	$ 11,582
Work in process	7,062	1,653
Finished goods	47,229	33,359
Total inventories	71,914	46,594
Property and equipment:
Equipment	68,335	43,533
Furniture and fixtures	8,314	5,897
Leasehold improvements	14,955	9,063
Software	35,399	30,693
Construction in progress	5,408	3,651
Property and equipment, gross	132,411	92,837
Accumulated depreciation and amortization	(90,203)	(60,528)
Total property and equipment, net	42,208	32,309
Other long term assets:
Capitalized software, net	27,130	26,011
Other assets	1,679	1,883
Total other long term assets, net	28,809	27,894
Accrued liabilities:
Advance payments from customers	7,443	8,327
Rebates and lease buyouts	4,384	4,702
Group purchasing organization fees	2,493	2,983
Taxes payable	2,722	2,768
Other accrued liabilities	17,861	11,353
Total accrued liabilities	$ 34,903	$ 30,133