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Note 10 - Financial Results for Reportable Segments (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Real Estate Segment [Member] | Operating Segments [Member]        
Operating Segment Revenues        
Operating Revenues $ 15,498 $ 211 $ 15,666 $ 323
Operating Segment Income (Loss)        
Operating Income (Loss) 14,142 (37) 14,009 (94)
Leasing Segment [Member] | Operating Segments [Member]        
Operating Segment Revenues        
Operating Revenues 1,277 1,422 2,892 2,837
Operating Segment Income (Loss)        
Operating Income (Loss) 732 811 1,634 1,688
Utilities Segment [Member] | Operating Segments [Member]        
Operating Segment Revenues        
Operating Revenues 878 807 1,726 1,623
Operating Segment Income (Loss)        
Operating Income (Loss) 289 225 506 429
Resort Amenities Segment [Member] | Operating Segments [Member]        
Operating Segment Revenues        
Operating Revenues 324 325 670 776
Operating Segment Income (Loss)        
Operating Income (Loss) 54 60 164 297
Operating Segments [Member]        
Operating Segment Revenues        
Operating Revenues 17,977 2,765 20,954 5,559
Operating Segment Income (Loss)        
Operating Income (Loss) 15,217 1,059 16,313 2,320
Operating Revenues 17,977 2,765 20,954 5,559
Operating Income (Loss) $ 13,849 $ (202) $ 13,033 $ (706)