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Note B - Marketable Securities (Tables)
12 Months Ended
Dec. 31, 2012
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]
 
December 31, 2012
 
Cost
   
 Fair Value
   
Unrealized
 Gain/(Loss)
 
                   
Available for sale: 
                 
Corporate bonds (maturities of 1-5 years)
  $ 203,920     $ 203,357     $ (563 )
Fixed income mutual funds 
    6,991,181       7,242,998       251,817  
Equity and other mutual funds 
    274,926       297,591       22,665  
    $ 7,470,027     $ 7,743,946     $ 273,919  
                         
December 31, 2011
                       
                         
Available for sale: 
                       
U.S. treasury and agencies (maturities of less than 1 year)
  $ 249,137     $ 234,388     $ (14,749 )
Corporate bonds
                       
Maturities of less than 1 year
    267,251       247,719       (19,532 )
Maturities of 1-5 years
    203,920       195,899       (8,021 )
Total corporate bonds
    471,171       443,618       (27,553 )
Fixed income mutual funds 
     8,268,624       8,372,216       103,592  
Equity and other mutual funds 
       253,850       245,533       (8,317 )
    $ 9,242,782     $ 9,295,755     $ 52,973