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Note 8 - Lease Revenue (Tables)
9 Months Ended
Sep. 30, 2020
Notes Tables  
Lessor, Operating Lease, Payment to be Received, Fiscal Year Maturity [Table Text Block]
   
Estimated
         
   
Straight-line
   
Lease Agreement
 
   
Rent Revenue
   
Fixed Rent
 
                 
Remainder of 2020
  $
86,433
    $
48,225
 
2021
   
345,732
     
385,800
 
2022
   
345,732
     
385,800
 
2023
   
345,732
     
385,800
 
2024
   
345,732
     
409,913
 
Thereafter
   
345,733
     
409,912
 
Total
  $
1,815,094
    $
2,025,450