Note 2 - Equity Method Investments (Detail) (USD $)	1 Months Ended	3 Months Ended
	Feb. 01, 2012	Mar. 31, 2013	Mar. 31, 2012
Equity Method Investment, Additional Information	20 percent
Proceeds From Sale Of InterestIn Joint Venture (in Dollars)	$ 9,103,000		$ (9,103,000)
Equity Method Investment Earnings Before EBITDA (in Dollars)		500,000
Equity Method Investment Net Working Capital (in Dollars)		2,500,000
Equity Method Investment Summarized Financial Information Related Party Transaction Amounts Of Transaction (in Dollars)		2,687	15,994
Equity Method Investment Summarized Financial Information Depreciation And Amortization (in Dollars)		1,170	1,259
LLC Company Agreement [Member]
Equity Method Investment Earnings Before EBITDA (in Dollars)		1,500,000
ICP Limited Liability Company [Member]
Equity Method Investment Earnings Before EBITDA (in Dollars)		$ 500,000