3) Investments: Residential Real Estate Investment (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Real estate held for investment (net of accumulated depreciation of $17,919,427 and $16,138,439 for 2017 and 2016)	$ 150,568,998	$ 145,165,921
Residential Real Estate 1
Real estate held for investment (net of accumulated depreciation of $17,919,427 and $16,138,439 for 2017 and 2016)	69,469,220	76,191,985
Residential Real Estate 1 | ArizonaMember
Real estate held for investment (net of accumulated depreciation of $17,919,427 and $16,138,439 for 2017 and 2016)	217,516	742,259
Residential Real Estate 1 | CaliforniaMember
Real estate held for investment (net of accumulated depreciation of $17,919,427 and $16,138,439 for 2017 and 2016)	5,663,871	5,848,389
Residential Real Estate 1 | ColoradoMember
Real estate held for investment (net of accumulated depreciation of $17,919,427 and $16,138,439 for 2017 and 2016)		364,489
Residential Real Estate 1 | FloridaMember
Real estate held for investment (net of accumulated depreciation of $17,919,427 and $16,138,439 for 2017 and 2016)	7,311,913	8,327,355
Residential Real Estate 1 | HawaiiMember
Real estate held for investment (net of accumulated depreciation of $17,919,427 and $16,138,439 for 2017 and 2016)	712,286
Residential Real Estate 1 | OhioMember
Real estate held for investment (net of accumulated depreciation of $17,919,427 and $16,138,439 for 2017 and 2016)		46,658
Residential Real Estate 1 | OklahomaMember
Real estate held for investment (net of accumulated depreciation of $17,919,427 and $16,138,439 for 2017 and 2016)	17,500
Residential Real Estate 1 | TexasMember
Real estate held for investment (net of accumulated depreciation of $17,919,427 and $16,138,439 for 2017 and 2016)	511,486	1,091,188
Residential Real Estate 1 | UtahMember
Real estate held for investment (net of accumulated depreciation of $17,919,427 and $16,138,439 for 2017 and 2016)	54,701,809	59,485,466
Residential Real Estate 1 | WashingtonMember
Real estate held for investment (net of accumulated depreciation of $17,919,427 and $16,138,439 for 2017 and 2016)	$ 286,181	$ 286,181