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3) Investments: Net carrying amount of held to maturity securities (Details) - Held-to-maturity Securities - USD ($)
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Net carrying amount for sales of securities $ 4,998,249 $ 2,240,249
Net realized loss related to sales of securities $ 243,023 $ 385,484