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Note 4 - Real Estate Under Development (Tables)
 12 Months Ended
Dec. 31, 2017
Notes Tables  
Real Estate Held for Development [Table Text Block]
       
December 31,
  
Property Name
  
Location
  
201
7
    
2016
  
Grand Parkway Marketplace
(1)
  
Spring, TX
   $
43,403
     $
94,841
  
Dania Pointe
  
Dania Beach, FL
    
152,841
      
107,113
  
Mill
Station
  
Owings Mills, MD
    
34,347
      
25,119
  
Lincoln Square (
2)
  
Philadelphia, PA
    
90,479
      
-
  
Avenues Walk
(3)
  
Jacksonville, FL
    
48,573
      
73,048
  
Promenade at Christiana
(4)
  
New Castle, DE
    
32,875
      
25,521
  
Staten Island Plaza (
5)
  
Staten Island, NY
    
-
      
9,386
  
   
 
  
$
402,518
    
$
335,028