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Note 1 - Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2018
Notes Tables  
Disaggregation of Revenue [Table Text Block]
Real estate
  $
446
 
Utilities
   
3,220
 
Resort amenities and other
   
1,148
 
Total
  $
4,814
 
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
   
Year Ended December 31,
 
   
2018
   
2017
 
                 
Basic and diluted
   
19,091,679
     
18,995,274
 
Potentially dilutive
   
27,500
     
27,500