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Note 10 - Notes Payable (Details Textual)
3 Months Ended 12 Months Ended
Sep. 30, 2018
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2019
Dec. 31, 2018
Vehicle Loans [Member]          
Debt Instrument, Interest Rate, Effective Percentage       5.99%  
Promissory Notes due September 15, 2022 [Member] | EDI Real Estate, LLC [Member] | Real Estate Held For Investment [Member]          
Number Of Promissory Notes     2    
Debt Instrument, Interest Rate, Stated Percentage     6.00%    
Debt Instrument, Maturity Date     Sep. 15, 2022    
Promissory Notes due September 1, 2033 [Member] | EDI Real Estate, LLC [Member] | Real Estate Held For Investment [Member]          
Debt Instrument, Interest Rate, Stated Percentage 5.60% 5.60%      
Debt Instrument Rate, Subject to Change, Term 5 years        
US Treasury Security, Term   5 years      
Debt Instrument, Maturity Date   Sep. 01, 2033      
Promissory Notes due September 1, 2033 [Member] | EDI Real Estate, LLC [Member] | Real Estate Held For Investment [Member] | Index Rate [Member]          
Debt Instrument, Basis Spread on Variable Rate   2.75%      
Interest-bearing Notes Payable Secured by Commercial Warehouse Held for Resale [Member]          
Debt Instrument, Interest Rate, Stated Percentage       8.00%  
Debt Secured By Properties Acquired by Mt Melrose, LLC [Member] | Real Estate Held For Investment [Member]          
Number Of Promissory Notes       0  
Debt Secured By Properties Acquired by Mt Melrose, LLC [Member] | Real Estate Held For Investment [Member] | Minimum [Member]          
Debt Instrument, Interest Rate, Effective Percentage         4.375%
Debt Secured By Properties Acquired by Mt Melrose, LLC [Member] | Real Estate Held For Investment [Member] | Maximum [Member]          
Debt Instrument, Interest Rate, Effective Percentage         13.00%