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Note 9 - Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2017
Notes Tables  
Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block]
   
Property
    
Service and
    
 
 
 
  
Syndicated
    
Network
    
 
 
 
   
and
    
Other
    
Operating
    
Television
    
Affiliation
    
 
 
 
Year
  
Equipment
    
Agreements
    
Leases
    
Programming
    
Agreements
    
Total
  
2018
   $
3,887
     $
2,856
     $
3,286
     $
6,214
     $
176,669
     $
192,912
  
2019
    
-
      
749
      
2,651
      
18,330
      
130,014
      
151,744
  
2020
    
-
      
-
      
2,284
      
12,571
      
140,357
      
155,212
  
2021
    
-
      
-
      
2,125
      
1,510
      
130,117
      
133,752
  
2022
    
-
      
-
      
1,952
      
691
      
2,679
      
5,322
  
Thereafter
    
-
      
-
      
5,294
      
451
      
-
      
5,745
  
Total
   $
3,887
     $
3,605
     $
17,592
     $
39,767
     $
579,836
     $
644,687