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Note 10 - Leases (Tables)
9 Months Ended
Sep. 30, 2021
Notes Tables  
Leases, Lease Income [Table Text Block]
   

Three Months Ended

   

Nine Months Ended

 
   

September 30,

2021

   

September 30,

2020

   

September 30,

2021

   

September 30,

2020

 

Minimum rental payments

  $ 54,267     $ 50,085     $ 157,919     $ 153,453  

Nonlease payments

    8,422       7,828       24,393       22,531  

Total

  $ 62,689     $ 57,913     $ 182,312     $ 175,984