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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.

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