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Note 7 - Investments in Joint Ventures: (Detail) (USD $)
1 Months Ended
May 31, 2012
Mar. 31, 2012
Dec. 31, 2011
Dec. 31, 2006
Equity Method Investment, Ownership Percentage   50.00%    
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures     $ 1,600,000 $ 3,200,000
Gain (Loss) on Disposition of Assets $ 9,000