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Note 3 - Marketable Equity Securities (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 30, 2013
Note 3 - Marketable Equity Securities (Details) [Line Items]        
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities $ 29,000 $ 70,000 $ 315,000  
Accumulated Other Comprehensive Income (Loss), Net of Tax 6,160,000 4,235,000 4,235,000 6,160,000
Available For Sale Securities Net Unrealized Holding Gain Loss Net Of Tax 1,897,000 459,000    
Trading Securities, Realized Gain 8,000 0    
Trading Securities, Realized Loss 0 26,000    
Borrowings Under Margin Account [Member]
        
Note 3 - Marketable Equity Securities (Details) [Line Items]        
Margin Account Borrowings $ 10,017,000 $ 10,711,000