Balance Sheet Components (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Inventories:
Raw materials	$ 11,027	$ 8,254
Work in process	2,238	64
Finished goods	36,195	23,236
Total inventories	49,460	31,554
Property and equipment:
Equipment	44,448	42,829
Furniture and fixtures	5,903	5,689
Leasehold improvements	9,064	8,701
Purchased software	29,770	28,920
Construction in progress	4,902	1,538
Property and equipment, gross	94,087	87,677
Accumulated depreciation and amortization	(60,061)	(51,499)
Total property and equipment, net	34,026	36,178
Other long term assets:
Capitalized software, net	24,838	19,643
Other assets	2,133	3,630
Total other long term assets, net	26,971	23,273
Accrued liabilities:
Rebates and lease buyouts	4,603	6,512
Advance payments from customers	7,567	4,834
Group purchasing organization fees	3,437	3,475
Taxes payable	3,574	2,181
Other accrued liabilities	10,201	2,297
Total accrued liabilities	$ 29,382	$ 19,299