Note 3 - Supplemental Balance Sheet Information (Detail) - Property, Plant and Equipment (USD $) In Thousands, unless otherwise specified					12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Land and Land Improvements [Member]	Dec. 31, 2011 Land and Land Improvements [Member]	Dec. 31, 2012 Building and Building Improvements [Member] Minimum [Member]	Dec. 31, 2012 Building and Building Improvements [Member] Maximum [Member]	Dec. 31, 2012 Building and Building Improvements [Member]	Dec. 31, 2011 Building and Building Improvements [Member]	Dec. 31, 2012 Machinery and Equipment [Member] Minimum [Member]	Dec. 31, 2012 Machinery and Equipment [Member] Maximum [Member]	Dec. 31, 2012 Machinery and Equipment [Member]	Dec. 31, 2011 Machinery and Equipment [Member]	Dec. 31, 2012 Furniture and Fixtures [Member] Minimum [Member]	Dec. 31, 2012 Furniture and Fixtures [Member] Maximum [Member]	Dec. 31, 2012 Furniture and Fixtures [Member]	Dec. 31, 2011 Furniture and Fixtures [Member]	Dec. 31, 2012 Vehicles [Member] Minimum [Member]	Dec. 31, 2012 Vehicles [Member] Maximum [Member]	Dec. 31, 2012 Vehicles [Member]	Dec. 31, 2011 Vehicles [Member]	Dec. 31, 2012 Construction in Progress [Member]	Dec. 31, 2011 Construction in Progress [Member]
Estimated Useful Lives					5 years	40 years			4 years	10 years			3 years	10 years			3 years	10 years
Property, plant and equipment, gross	$ 359,804	$ 335,261	$ 11,988	$ 12,725			$ 64,706	$ 64,810			$ 179,858	$ 176,997			$ 17,037	$ 16,611			$ 50,167	$ 48,855	$ 36,048	$ 15,263
Less – Accumulated depreciation	(173,838)	(166,316)
Total	$ 185,966	$ 168,945