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Note C - Marketable Equity Securities (Details) (USD $)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Mar. 31, 2014
Note C - Marketable Equity Securities (Details) [Line Items]            
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities $ 1,000 $ 3,000 $ 1,000 $ 27,000    
Accumulated Other Comprehensive Income (Loss), Net of Tax 7,293,000   7,293,000   6,160,000 6,582,000
Available For Sale Securities Net Unrealized Holding Gain Loss Net Of Tax 1,111,000       1,897,000  
Trading Securities, Realized Gain 57,000 0        
Trading Securities, Realized Loss 0 6,000        
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 0   0   0  
Trading Securities Pledged as Collateral 9,620,000   9,620,000   10,017,000  
Available-for-sale Securities [Member]
            
Note C - Marketable Equity Securities (Details) [Line Items]            
Accumulated Other Comprehensive Income (Loss), Net of Tax $ 7,293,000   $ 7,293,000   $ 6,160,000