3) Investments: Residential Real Estate Investment (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Real estate held for investment (net of accumulated depreciation of $15,540,213 and $18,788,869 for 2018 and 2017)	$ 105,063,331	$ 141,298,706
Residential Real Estate 1
Real estate held for investment (net of accumulated depreciation of $15,540,213 and $18,788,869 for 2018 and 2017)	31,874,263	68,329,917
Residential Real Estate 1 | Arizona
Real estate held for investment (net of accumulated depreciation of $15,540,213 and $18,788,869 for 2018 and 2017)		217,105
Residential Real Estate 1 | California
Real estate held for investment (net of accumulated depreciation of $15,540,213 and $18,788,869 for 2018 and 2017)	5,407,203	5,463,878
Residential Real Estate 1 | Florida
Real estate held for investment (net of accumulated depreciation of $15,540,213 and $18,788,869 for 2018 and 2017)	6,839,021	7,000,684
Residential Real Estate 1 | Hawaii
Real estate held for investment (net of accumulated depreciation of $15,540,213 and $18,788,869 for 2018 and 2017)	712,286	712,286
Residential Real Estate 1 | Ohio
Real estate held for investment (net of accumulated depreciation of $15,540,213 and $18,788,869 for 2018 and 2017)		10,000
Residential Real Estate 1 | Oklahoma
Real estate held for investment (net of accumulated depreciation of $15,540,213 and $18,788,869 for 2018 and 2017)		17,500
Residential Real Estate 1 | Texas
Real estate held for investment (net of accumulated depreciation of $15,540,213 and $18,788,869 for 2018 and 2017)	554,486	509,011
Residential Real Estate 1 | Utah
Real estate held for investment (net of accumulated depreciation of $15,540,213 and $18,788,869 for 2018 and 2017)	18,065,086	54,113,272
Residential Real Estate 1 | Washington
Real estate held for investment (net of accumulated depreciation of $15,540,213 and $18,788,869 for 2018 and 2017)	$ 286,181	$ 286,181