Details of investment securities available-for-sale and held-to-maturity as of June 30, 2021 and December 31, 2020 were as follows:

	Available-for-Sale
	June 30, 2021
			Gross		Gross			Estimated
	Amortized		Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
	(Dollars in Thousands)
Mortgage-backed securities:
Residential	$	47,269	$	757	$	(4	)	$	48,022
Commercial		31,688		652		(61	)		32,279
Obligations of states and political subdivisions		3,711		117		—			3,828
Corporate notes		4,321		34		—			4,355
U.S. Treasury securities		30,202		71		(22	)		30,251
Total	$	117,191	$	1,631	$	(87	)	$	118,735

	Held-to-Maturity
	June 30, 2021
			Gross		Gross		Estimated
	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
	(Dollars in Thousands)
Mortgage-backed securities:
Commercial	$	2,964	$	65	$	—	$	3,029
Obligations of U.S. government-sponsored agencies		928		21		—		949
Obligations of states and political subdivisions		956		9		—		965
Total	$	4,848	$	95	$	—	$	4,943

	Available-for-Sale
	December 31, 2020
			Gross		Gross			Estimated
	Amortized		Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
	(Dollars in Thousands)
Mortgage-backed securities:
Residential	$	24,680	$	865	$	(8	)	$	25,537
Commercial		40,849		780		(142	)		41,487
Obligations of states and political subdivisions		4,971		137		—			5,108
Corporate notes		2,711		73		—			2,784
U.S. Treasury securities		10,078		—		(1	)		10,077
Total	$	83,289	$	1,855	$	(151	)	$	84,993

	Held-to-Maturity
	December 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(Dollars in Thousands)
Mortgage-backed securities:
Commercial	$	4,302	$	75	$	—	$	4,377
Obligations of U.S. government-sponsored agencies		1,120		34		—		1,154
Obligations of states and political subdivisions		1,007		21		—		1,028
Total	$	6,429	$	130	$	—	$	6,559

The scheduled maturities of investment securities available-for-sale and held-to-maturity as of June 30, 2021 are presented in the following table:

	Available-for-Sale				Held-to-Maturity
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
	(Dollars in Thousands)
Maturing within one year	$	84	$	84	$	402	$	407
Maturing after one to five years		21,185		21,369		360		361
Maturing after five to ten years		64,499		65,480		2,447		2,505
Maturing after ten years		31,423		31,802		1,639		1,670
Total	$	117,191	$	118,735	$	4,848	$	4,943

For purposes of the maturity table, mortgage-backed securities, which are not due at a single maturity date, have been allocated over maturity groupings based on the weighted-average contractual maturities of underlying collateral. The mortgage-backed securities generally mature earlier than their weighted-average contractual maturities because of principal prepayments.

The following tables reflect gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, as of June 30, 2021 and December 31, 2020.

	Available-for-Sale
	June 30, 2021
	Less than 12 Months					12 Months or More
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(Dollars in Thousands)
Mortgage-backed securities:
Residential	$	183	$	—		$	781	$	(4	)
Commercial		453		—			3,188		(61	)
U.S. Treasury securities		10,156		(22	)		—		—
Total	$	10,792	$	(22	)	$	3,969	$	(65	)

	Held-to-Maturity
	June 30, 2021
	Less than 12 Months				12 Months or More
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
	(Dollars in Thousands)
Mortgage-backed securities:
Commercial	$	48	$	—	$	—	$	—
Total	$	48	$	—	$	—	$	—

	Available-for-Sale
	December 31, 2020
	Less than 12 Months					12 Months or More
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(Dollars in Thousands)
Mortgage-backed securities:
Residential	$	2,334	$	(1	)	$	1,019	$	(7	)
Commercial		2,630		(1	)		3,327		(141	)
U.S. Treasury securities		10,077		(1	)		—		—
Total	$	15,041	$	(3	)	$	4,346	$	(148	)

	Held-to-Maturity
	December 31, 2020
	Less than 12 Months				12 Months or More
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
	(Dollars in Thousands)
Mortgage-backed securities:
Commercial	$	412	$	—	$	—	$	—
Total	$	412	$	—	$	—	$	—

Management evaluates securities for other-than-temporary impairment no less frequently than quarterly and more frequently when economic or market concerns warrant such evaluation. Consideration is given to: (i) the length of time and the extent to which fair value has been less than cost; (ii) the financial condition and near-term prospects of the issuer; (iii) whether the Company intends to sell the securities; and (iv) whether it is more likely than not that the Company will be required to sell the securities before recovery of their amortized cost bases.

As of June 30, 2021, 10 debt securities had been in a loss position for more than 12 months, and six debt securities had been in a loss position for less than 12 months. As of December 31, 2020, nine debt securities had been in a loss position for more than 12 months, and 11 debt securities had been in a loss position for less than 12 months. As of both June 30, 2021 and December 31, 2020, the losses for all securities were considered to be a direct result of the effect that the prevailing interest rate environment had on the value of debt securities and were not related to the creditworthiness of the issuers. There was a substantial decrease in interest rates during the year ended December 31, 2020, including a 150-basis point reduction in the federal funds rate in March 2020. This resulted in significant increases in the fair value of debt securities and a corresponding decline in the number of securities in a loss position during 2020 and the first half of 2021. Most of the securities in an unrealized loss position as of both June 30, 2021 and December 31, 2020 were residential or commercial mortgage-backed securities that

are either direct obligations of the U.S. government or government-sponsored entities and, accordingly, have little associated credit risk. Further, the Company has the current intent and ability to retain its investments in the issuers for a period of time that management believes to be sufficient to allow for any anticipated recovery in fair value. Therefore, the Company did not recognize any other-than-temporary impairments as of June 30, 2021 or December 31, 2020.

Investment securities with a carrying value of $57.1 million and $72.9 million as of June 30, 2021 and December 31, 2020, respectively, were pledged to secure public deposits and for other purposes.