Note 4 - Balance Sheet Components (Details) - Property and Equipment, Net (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	$ 28,444	$ 22,679
Total property and equipment	28,444	22,679
Less accumulated depreciation and amortization	(19,012)	(16,382)
Property and equipment, net	9,432	6,297
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	25,268	20,217
Total property and equipment	25,268	20,217
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	720	702
Total property and equipment	720	702
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	2,456	1,760
Total property and equipment	$ 2,456	$ 1,760