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Fair Value Measurements, Carrying Values and Estimated Fair Values of Financial Instruments not Recorded at Fair Value (Details) - USD ($)
Jun. 30, 2018
Dec. 31, 2017
Carrying Amount [Member]    
Assets [Abstract]    
Mortgage loans on real estate $ 15,085,559 $ 17,314,477
Investment real estate, net 49,629,677 50,504,550
Notes receivable 22,179,954 19,004,016
Policy loans 9,431,972 9,559,142
Cash and cash equivalents 14,154,164 25,434,199
Estimated Fair Value [Member]    
Assets [Abstract]    
Mortgage loans on real estate 15,085,559 17,314,477
Investment real estate, net 49,629,677 50,504,550
Notes receivable 22,179,954 19,004,016
Policy loans 9,431,972 9,559,142
Cash and cash equivalents $ 14,154,164 $ 25,434,199
Minimum [Member]    
Liabilities [Abstract]    
Policy loan interest rate 4.00%  
Maximum [Member]    
Liabilities [Abstract]    
Policy loan interest rate 8.00%