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Note 4 - Real Estate Assets Held for Sale (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Disclosure of Long Lived Assets Held-for-sale [Table Text Block]
    2019
     
Real estate assets held for sale        
Real estate assets held for sale - current   $
10,741
 
Real estate assets held for sale - non-current    
247,376
 
Total real estate assets held for sale   $
258,117
 
         
Liabilities related to real estate assets held for sale        
Liabilities related to real estate assets held for sale - current   $
(36,191
)
Liabilities related to real estate assets held for sale - non-current    
(127,703
)
Total liabilities related to real estate assets held for sale   $
(163,894
)
         
Total net real estate assets held for sale   $
94,223