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3) Investments: Commercial Real Estate Investment (Details)
Sep. 30, 2018
USD ($)
Dec. 31, 2017
USD ($)
Real estate held for investment (net of accumulated depreciation) $ 119,076,609 $ 141,298,706
Commercial Real Estate    
Real estate held for investment (net of accumulated depreciation) $ 92,088,430 $ 72,968,789
Square Footage 765,692 723,477
Commercial Real Estate | Arizona    
Real estate held for investment (net of accumulated depreciation) $ 4,000 $ 4,000
Square Footage 0 0
Commercial Real Estate | Arkansas    
Real estate held for investment (net of accumulated depreciation) $ 0 $ 96,169
Square Footage 0 3,200
Commercial Real Estate | Kansas    
Real estate held for investment (net of accumulated depreciation) $ 6,086,759 $ 7,200,000
Square Footage 222,679 222,679
Commercial Real Estate | Louisiana    
Real estate held for investment (net of accumulated depreciation) $ 474,069 $ 493,197
Square Footage 7,063 7,063
Commercial Real Estate | Mississippi    
Real estate held for investment (net of accumulated depreciation) $ 3,655,283 $ 3,725,039
Square Footage 33,821 33,821
Commercial Real Estate | New Mexico    
Real estate held for investment (net of accumulated depreciation) $ 7,000 $ 7,000
Square Footage 0 0
Commercial Real Estate | Texas    
Real estate held for investment (net of accumulated depreciation) $ 335,000 $ 335,000
Square Footage 0 23,470
Commercial Real Estate | Utah    
Real estate held for investment (net of accumulated depreciation) $ 81,526,319 $ 61,108,384
Square Footage 502,129 433,244