Note 5 - Balance Sheet Components (Details) - Property and Equipment, Net (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property and equipment	$ 133,842	$ 123,824
Less: accumulated depreciation and amortization	(70,900)	(58,987)
Total	62,942	64,837
Production Equipment And Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	88,929	83,075
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	29,386	29,342
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	5,600	5,600
Transportation Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	4,694	976
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	2,883	2,681
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 2,350	$ 2,150