Investments: Schedule of aging of mortgage loans (Details) - USD ($)		6 Months Ended	12 Months Ended
		Jun. 30, 2021	Dec. 31, 2020
Marketable Securities [Line Items]
Mortgage Loans during period		$ 266,363,862	$ 253,771,091
Mortgage Loans, Allowance for Loan Losses		(1,900,935)	(2,005,127)
Mortgage Loans, Unamortized deferred loan fees, net		(1,725,718)	(1,161,132)
Mortgage Loans, Unamortized discounts, net		(577,202)	(1,260,896)
Mortgage Loans, Unamortized discounts, net		577,202	1,260,896
Commercial Loan [Member]
Marketable Securities [Line Items]
Mortgage Loans during period		47,440,235	46,836,866
Mortgage Loans, Allowance for Loan Losses		(187,129)	(187,129)
Mortgage Loans, Unamortized deferred loan fees, net		(83,409)	(32,557)
Mortgage Loans, Unamortized discounts, net		(295,255)	(880,721)
Mortgage Loans, Unamortized discounts, net		295,255	880,721
Residential Mortgage [Member]
Marketable Securities [Line Items]
Mortgage Loans during period		83,195,347	95,822,448
Mortgage Loans, Allowance for Loan Losses		(1,670,604)	(1,774,796)
Mortgage Loans, Unamortized deferred loan fees, net		(1,160,086)	(909,864)
Mortgage Loans, Unamortized discounts, net		(281,947)	(380,175)
Mortgage Loans, Unamortized discounts, net		281,947	380,175
Residential construction
Marketable Securities [Line Items]
Mortgage Loans during period		135,728,280	111,111,777
Mortgage Loans, Allowance for Loan Losses		(43,202)	(43,202)
Mortgage Loans, Unamortized deferred loan fees, net		(482,223)	(218,711)
Mortgage Loans, Unamortized discounts, net		0
Mortgage Loans, Unamortized discounts, net		0
Past Due 30 to 59 Days
Marketable Securities [Line Items]
Mortgage Loans during period		10,823,242	6,226,896
Past Due 30 to 59 Days | Commercial Loan [Member]
Marketable Securities [Line Items]
Mortgage Loans during period		6,000,000	233,200
Past Due 30 to 59 Days | Residential Mortgage [Member]
Marketable Securities [Line Items]
Mortgage Loans during period		4,328,577	5,866,505
Past Due 30 to 59 Days | Residential construction
Marketable Securities [Line Items]
Mortgage Loans during period		494,665	127,191
Past Due 60 to 89 Days
Marketable Securities [Line Items]
Mortgage Loans during period		4,858,494	2,860,928
Past Due 60 to 89 Days | Commercial Loan [Member]
Marketable Securities [Line Items]
Mortgage Loans during period		554,638	812,780
Past Due 60 to 89 Days | Residential Mortgage [Member]
Marketable Securities [Line Items]
Mortgage Loans during period		3,338,670	2,048,148
Past Due 60 to 89 Days | Residential construction
Marketable Securities [Line Items]
Mortgage Loans during period		965,186
Past Due 90 or More Days
Marketable Securities [Line Items]
Mortgage Loans during period	[1]	3,032,717	7,818,410
Past Due 90 or More Days | Commercial Loan [Member]
Marketable Securities [Line Items]
Mortgage Loans during period	[1]	599,291	2,148,827
Past Due 90 or More Days | Residential Mortgage [Member]
Marketable Securities [Line Items]
Mortgage Loans during period	[1]	2,433,426	5,669,583
Past Due 90 or More Days | Residential construction
Marketable Securities [Line Items]
Mortgage Loans during period	[1]	0	0
In Foreclosure
Marketable Securities [Line Items]
Mortgage Loans during period	[1]	1,692,992	2,464,060
In Foreclosure | Commercial Loan [Member]
Marketable Securities [Line Items]
Mortgage Loans during period	[1]	249,173	0
In Foreclosure | Residential Mortgage [Member]
Marketable Securities [Line Items]
Mortgage Loans during period	[1]	1,242,856	2,263,097
In Foreclosure | Residential construction
Marketable Securities [Line Items]
Mortgage Loans during period	[1]	200,963	200,963
Total Past Due
Marketable Securities [Line Items]
Mortgage Loans during period		20,407,445	19,370,294
Total Past Due | Commercial Loan [Member]
Marketable Securities [Line Items]
Mortgage Loans during period		7,403,102	3,194,807
Total Past Due | Residential Mortgage [Member]
Marketable Securities [Line Items]
Mortgage Loans during period		11,343,529	15,847,333
Total Past Due | Residential construction
Marketable Securities [Line Items]
Mortgage Loans during period		1,660,814	328,154
Current
Marketable Securities [Line Items]
Mortgage Loans during period		245,956,417	234,400,797
Current | Commercial Loan [Member]
Marketable Securities [Line Items]
Mortgage Loans during period		40,037,133	43,642,059
Current | Residential Mortgage [Member]
Marketable Securities [Line Items]
Mortgage Loans during period		71,851,818	79,975,115
Current | Residential construction
Marketable Securities [Line Items]
Mortgage Loans during period		134,067,466	110,783,623
Net Mortgage Loans
Marketable Securities [Line Items]
Mortgage Loans during period		262,160,007	249,343,936
Net Mortgage Loans | Commercial Loan [Member]
Marketable Securities [Line Items]
Mortgage Loans during period		46,874,442	45,736,459
Net Mortgage Loans | Residential Mortgage [Member]
Marketable Securities [Line Items]
Mortgage Loans during period		80,082,710	92,757,613
Net Mortgage Loans | Residential construction
Marketable Securities [Line Items]
Mortgage Loans during period		$ 135,202,855	$ 110,849,864

[1] Interest income is not recognized on loans past due greater than 90 days or in foreclosure.