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Note 10 - Leases (Tables)
6 Months Ended
Jun. 30, 2020
Notes Tables  
Leases, Lease Income [Table Text Block]
  

Three Months Ended

  

Six Months Ended

 
  

June 30, 2020

  

June 30, 2019

  

June 30, 2020

  

June 30, 2019

 

Minimum rental payments

 $50,195  $53,585  $103,368  $105,327 

Nonlease payments

  7,095   8,006   14,703   15,697 

Total

 $57,290  $61,591  $118,071  $121,024