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Note 3 - Periodic Pension Expense (Tables)
6 Months Ended
Jun. 30, 2015
Notes Tables  
Schedule of Net Benefit Costs [Table Text Block]
    Three Months     Six Months  
   
Ended June 30,
   
Ended June 30,
 
   
2015
   
2014
   
2015
   
2014
 
                                 
Service cost - benefits earned during the period
  $ 26,000     $ 20,000     $ 52,000     $ 40,000  
Interest cost on projected benefit obligation
    238,000       251,000       476,000       501,000  
Expected return on plan assets
    (335,000 )     (349,000 )     (671,000 )     (697,000 )
Recognized actuarial loss
    200,000       81,000       399,000       162,000  
Settlement loss
    311,000       -       311,000       -  
Net periodic pension cost
  $ 440,000     $ 3,000     $ 567,000     $ 6,000