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Note 6 - Statement of Net Assets in Liquidation (Details Textual)
 9 Months Ended 15 Months Ended 24 Months Ended
Sep. 30, 2016
USD ($)
$ / shares
shares
Dec. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
Jun. 30, 2016
shares
Dec. 31, 2015
USD ($)
Liquidation Basis of Accounting [Member]          
Liquidation Basis of Accounting, Common Stock Per Share | $ / shares $ 18.89        
Cash and Marketable Securities $ 8,700,000        
Liquidation Basis of Accounting, Land Development Costs Incurred 770,000        
Land Purchase Amount Including Closing Costs 210,000        
Net Assets $ 28,008,395       $ 43,455,577
Common Stock, Shares, Outstanding | shares       1,482,680  
Scenario, Forecast [Member]          
Liquidation Basis of Accounting, Land Development Costs   $ 2,380,000 $ 3,150,000    
Medical Office Park [Member] | Controlled by Parent Company [Member]          
Number of Units in Real Estate Property 4        
Liquidation Basis of Accounting, Common Stock Per Share | $ / shares $ 18.89        
Common Stock, Shares, Outstanding | shares 1,482,680