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Note 7 - Balance Sheet Details - Property and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Property and equipment, gross $ 356,548 $ 319,158
Accumulated depreciation (126,168) (106,365)
Total 230,380 212,793
Land and Land Improvements [Member]    
Property and equipment, gross 13,118 12,079
Building and Building Improvements [Member]    
Property and equipment, gross 132,072 122,747
Machinery and Equipment [Member]    
Property and equipment, gross 90,487 81,687
Dies and Tools [Member]    
Property and equipment, gross 24,504 23,269
Vehicles [Member]    
Property and equipment, gross 1,878 1,474
Office Equipment [Member]    
Property and equipment, gross 73,254 66,929
Leasehold Improvements [Member]    
Property and equipment, gross 2,436 2,319
Construction in Progress [Member]    
Property and equipment, gross $ 18,799 $ 8,654