Note 5 - Balance Sheet Components (Details) - Property and Equipment, Net - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property and equipment	$ 142,483	$ 133,842
Less: accumulated depreciation and amortization	(77,124)	(70,900)
Total	65,359	62,942
Production Equipment And Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	92,208	88,929
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	34,736	29,386
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	4,694
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	2,962	2,883
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 2,283	$ 2,350