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Investments, Mortgage Loans, Investment Real Estate, and Notes Receivable (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Mortgage Loans [Abstract]    
Mortgage loans acquired, including discounted mortgage loans $ 3,575,500 $ 0
Servicing fee on loan 0.25%  
Loan origination 0.50%  
Loan limit threshold for appraised property value 80.00%  
Mortgage loans reserve $ 0 0
Discounted mortgage loan holdings [Abstract]    
In good standing 8,829,640 7,169,272
Overdue interest over 90 days 1,873,913 1,899,839
Total mortgage loans 10,703,553 9,069,111 [1]
Notes Receivable [Abstract]    
Valuation allowance 0 0
Equity Securities without Readily Determinable Fair Value, Amount $ 12,133,745 $ 12,118,617 [1]
Farm Loans [Member] | Maximum [Member]    
Mortgage Loans [Abstract]    
Interest rate on mortgage loans 5.00% 5.00%
Farm Loans [Member] | Minimum [Member]    
Mortgage Loans [Abstract]    
Interest rate on mortgage loans 5.00% 5.00%
Commercial Loans [Member] | Maximum [Member]    
Mortgage Loans [Abstract]    
Interest rate on mortgage loans 7.50% 7.50%
Commercial Loans [Member] | Minimum [Member]    
Mortgage Loans [Abstract]    
Interest rate on mortgage loans 4.00% 4.00%
Residential Loans [Member] | Maximum [Member]    
Mortgage Loans [Abstract]    
Interest rate on mortgage loans 8.00% 8.00%
Residential Loans [Member] | Minimum [Member]    
Mortgage Loans [Abstract]    
Interest rate on mortgage loans 8.00% 8.00%
[1] Balance sheet audited at December 31, 2017.