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Note 7 - Investments (Tables)
12 Months Ended
Dec. 31, 2015
Notes Tables  
Investment [Table Text Block]
 
 
December 31,
 
 
 
2014
 
 
2015
 
Investment in CoBank stock
  $ 1,475     $ 1,475  
Rental property
    321       296  
Other miscellaneous
    74       75  
    $ 1,870     $ 1,846