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Major Tenants (Tables)
 12 Months Ended
Dec. 31, 2021
Accounting Policies [Abstract]  
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block] Major Tenants
Tenants
     
2021
 
2020
             
Sterling Jewelers Inc.
 
 
$
316,021
$
309,506
Best Buy Stores, L.P.
 
 
 
282,241
 
282,241
Dollar Tree Stores, Inc.
   
 
130,277
 
130,277
Bio-Medical Applications of Louisiana, LLC
 
 
 
0
 
108,528
Aggregate rental income of major tenants
 
 
$
728,539
$
830,552
Aggregate rental income of major tenants
as a percentage of total rental income
 
 
 
87%
 
100%