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4) Loans Held For Sale: Aggregate fair value - Loans Held for Sale (Details) - USD ($) | Sep. 30, 2020 | Dec. 31, 2019
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Text Block [Abstract] |  |
Aggregate Fair Value - Loans Held For Sale | $ 445,878,979 | $ 213,457,632
Aggregate unpaid principal balance - Loans Held for Sale | 428,860,105 | 206,417,122
Unrealized gain - Loans Held for Sale | $ 17,018,874 | $ 7,040,510

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