Note 7 - Equity Investment (Detail) (MWL [Member], USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 28, 2013
Equity Method Investment, Ownership Percentage			45.00%
Equity Method Investments			$ 2,600,000
Revenue from Related Parties	2,200,000	2,500,000
Due from Affiliates		893,000
Due to Affiliate		$ 2,300,000
Percentage Owned By Non-Related Party [Member]
Equity Method Investment, Ownership Percentage			55.00%