Investment securities

12 Months Ended

Dec. 31, 2021

Investments, Debt and Equity Securities [Abstract]

Investment securities consisted of the following:


	Amortized cost		Gross unrealized gains		Gross unrealized losses			Estimated fair value
December 31, 2021
Federal agency bonds — mortgage-backed	$	8,696,093	$	—	$	(61,016	)	$	8,635,077
Total investment securities available-for-sale	$	8,696,093	$	—	$	(61,016	)	$	8,635,077


	Amortized cost		Gross unrealized gains		Gross unrealized losses		Estimated fair value
December 31, 2020
Federal agency bonds — mortgage-backed	$	8,692,637	$	14,207	$	—	$	8,706,844
Total investment securities available-for-sale	$	8,692,637	$	14,207	$	—	$	8,706,844

The amortized cost and estimated fair value of investment securities by contractual maturity, are shown below:


	Available-for-sale
December 31, 2021	Amortized cost		Estimated fair value
Due after one year through five years	$	8,696,093	$	8,635,077
Total investment securities available-for-sale	$	8,696,093	$	8,635,077

Investment securities with an estimated fair value of $8,635,077 and $8,706,844 as of December 31, 2021 and 2020, respectively, were pledged to secure our revolving line of credit. See Note 6 for additional information.

The Company had no investments reach maturity or sold during the year ended December 31, 2021. The Company had three investments reach maturity totaling $4,950,000 during the year ended December 31, 2020. The Company also recorded two sales and recognized a gain of $13,927 during the year ended December 31, 2020.