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Fair Value Measurements, Carrying Values and Estimated Fair Values of Financial Instruments not Recorded at Fair Value (Details) - USD ($)
Mar. 31, 2018
Dec. 31, 2017
Carrying Amount [Member]    
Assets [Abstract]    
Mortgage loans on real estate $ 15,310,336 $ 17,314,477
Investment real estate, net 48,937,132 50,504,550
Notes receivable 18,440,090 19,004,016
Policy loans 9,597,632 9,559,142
Cash and cash equivalents 19,955,662 25,434,199
Estimated Fair Value [Member]    
Assets [Abstract]    
Mortgage loans on real estate 15,310,336 17,314,477
Investment real estate, net 48,937,132 50,504,550
Notes receivable 18,440,090 19,004,016
Policy loans 9,597,632 9,559,142
Cash and cash equivalents $ 19,955,662 $ 25,434,199
Minimum [Member]    
Liabilities [Abstract]    
Policy loan interest rate 4.00%  
Maximum [Member]    
Liabilities [Abstract]    
Policy loan interest rate 8.00%