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Fair Value Measurements, Carrying Values and Estimated Fair Values of Financial Instruments not Recorded at Fair Value (Details) - USD ($)
Sep. 30, 2018
Dec. 31, 2017
Carrying Amount [Member]    
Assets [Abstract]    
Mortgage loans on real estate $ 12,938,166 $ 17,314,477
Investment real estate 48,634,135 50,504,550
Notes receivable 20,444,752 19,004,016
Policy loans 9,381,104 9,559,142
Cash and cash equivalents 25,906,410 25,434,199
Short term investments 5,435,076 0
Estimated Fair Value [Member]    
Assets [Abstract]    
Mortgage loans on real estate 12,938,166 17,314,477
Investment real estate 48,634,135 50,504,550
Notes receivable 20,444,752 19,004,016
Policy loans 9,381,104 9,559,142
Cash and cash equivalents 25,906,410 25,434,199
Short term investments $ 5,435,076 $ 0
Minimum [Member]    
Liabilities [Abstract]    
Policy loan interest rate 4.00%  
Maximum [Member]    
Liabilities [Abstract]    
Policy loan interest rate 8.00%