Note 5 - Balance Sheet Details (Details) - Property and Equipment (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Gross property and equipment	$ 216,477	$ 206,731
Accumulated depreciation	(63,414)	(60,341)
Total	153,063	146,390
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	7,444	7,416
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	97,132	96,161
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	61,214	54,847
Dies and Tools [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	15,491	17,071
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	2,023	1,979
Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	19,281	17,304
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	2,412	2,229
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	$ 11,480	$ 9,724