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Note C - Marketable Equity Securities (Details) (USD $)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Jun. 30, 2014
Note C - Marketable Equity Securities (Details) [Line Items]          
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities $ 2,000 $ 1,000 $ 29,000    
Accumulated Other Comprehensive Income (Loss), Net of Tax   6,812,000   6,160,000 7,293,000
Available For Sale Securities Net Unrealized Holding Gain Loss Net Of Tax   636,000   1,897,000  
Trading Securities, Accumulated Gross Recognized Loss 9,000 0 9,000    
Trading Securities, Accumulated Gross Recognized Gain 0 89,000 0    
Marketable Securities, Reclassification   0 0    
Trading Securities Pledged as Collateral   9,930,000   10,017,000  
Available-for-sale Securities [Member]
          
Note C - Marketable Equity Securities (Details) [Line Items]          
Accumulated Other Comprehensive Income (Loss), Net of Tax   $ 6,812,000   $ 6,160,000