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Note 9 - Accumulated Other Comprehensive Loss (Tables)
9 Months Ended
Sep. 30, 2018
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   
Defined
                 
   
Benefit
                 
   
Pension
   
Interest
         
   
Plan
   
Rate Swaps
   
Total
 
Balance at December 31, 2017
  $
(2,765
)   $
369
    $
(2,396
)
Other comprehensive income before reclassifications
   
121
     
306
     
427
 
Reclassifications from accumulated comprehensive income (loss) to net income
   
121
     
(184
)    
(63
)
Net other comprehensive income
   
242
     
122
     
364
 
Balance at September 30, 2018
  $
(2,523
)   $
491
    $
(2,032
)
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]
   
Three Months Ended
   
Nine Months Ended
 
   
September 30,
   
September 30,
 
   
2018
   
2017
   
2018
   
2017
 
Amortization of defined benefit plan pension items:
                               
Amortization of (income) loss
  $
(13
)   $
153
    $
169
    $
461
 
Income tax effect
   
4
     
(63
)    
(48
)    
(189
)
After tax
   
(9
)    
90
     
121
     
272
 
                                 
Amortization of (gain) loss on interest rate swap:
                               
Reclassification to interest expense
   
(136
)    
33
     
(258
)    
82
 
Income tax effect
   
39
     
(14
)    
74
     
(34
)
After tax
   
(97
)    
19
     
(184
)    
48
 
Total reclassifications, net of income tax
  $
(106
)   $
109
    $
(63
)   $
320