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Note 12 - Leasing Arrangements (Tables)
9 Months Ended
Sep. 30, 2020
Notes Tables  
Operating Lease, Lease Income [Table Text Block]
   
Three Months Ended
   
Nine Months Ended
 
   
September 30,
   
September 30,
 
   
(unaudited)
   
(unaudited)
 
   
2020
   
2019
   
2020
   
2019
 
   
(in thousands)
   
(in thousands)
 
                                 
Minimum rentals
  $
677
    $
723
    $
2,086
    $
2,170
 
Percentage rentals
   
-
     
488
     
304
     
1,353
 
Licensing fees
   
104
     
217
     
449
     
681
 
Water system sales
   
318
     
337
     
822
     
894
 
Other
   
349
     
402
     
959
     
1,023
 
Total
  $
1,448
    $
2,167
    $
4,620
    $
6,121