Available-for-Sale Securities (Tables)

12 Months Ended

Dec. 31, 2018

Investments Debt And Equity Securities [Abstract]

Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value of Available-for-Sale Securities

The amortized cost, gross unrealized gains and losses, and fair value of available-for-sale securities at December 31, 2018 and 2017 are summarized as follows:

	December 31, 2018
			Gross		Gross
	Amortized		Unrealized		Unrealized
	Cost		Gains		Losses			Fair Value
U.S. Government and Federal Agencies	$	20,924	$	—	$	(409	)	$	20,515
U.S Treasury		4,997		—		(2	)		4,995
Mortgage-Backed Securities:
FNMA Certificates		778		—		(19	)		759
GNMA Certificates		870		5		—			875
	$	27,569	$	5	$	(430	)	$	27,144

	December 31, 2017
			Gross		Gross
	Amortized		Unrealized		Unrealized
	Cost		Gains		Losses			Fair Value
U.S. Government and Federal Agencies	$	24,911	$	—	$	(359	)	$	24,552
Mortgage-Backed Securities:
FNMA Certificates		1,118		—		(15	)		1,103
GNMA Certificates		3,205		38		(1	)		3,242
	$	29,234	$	38	$	(375	)	$	28,897

Company's Securities' Gross Unrealized Losses and Fair Values, Aggregated by Length of Time Individual Securities Have Been in a Continuous Unrealized Loss Position

The following tables present the Company's securities' gross unrealized losses and fair values, aggregated by the length of time the individual securities have been in a continuous unrealized loss position, at December 31, 2018 and 2017:

	December 31, 2018
	Securities With Gross Unrealized Losses
	Less Than 12 Months					12 Months or More					Total		Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
	Value		Loss			Value		Loss			Value		Loss
U.S. Government and Federal Agencies	$	—	$	—		$	20,515	$	(409	)	$	20,515	$	(409	)
US Treasury		4,995		(2	)							4,995		(2	)
Mortgage-Backed
FNMA Certificates		—		—			759		(19	)		759		(19	)
GNMA Certificates		—		—			—		—			—		—
	$	4,995	$	(2	)	$	21,274	$	(428	)	$	26,269	$	(430	)

	December 31, 2017
	Securities With Gross Unrealized Losses
	Less Than 12 Months					12 Months or More					Total		Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
	Value		Loss			Value		Loss			Value		Loss
U.S. Government and Federal Agencies	$	—	$	—		$	24,552	$	(359	)	$	24,552	$	(359	)
Mortgage-Backed
FNMA Certificates		1,094		(15	)		—		—			1,094		(15	)
GNMA Certificates		1,205		(1	)		—		—			1,205		(1	)
	$	2,299	$	(16	)	$	24,552	$	(359	)	$	26,851	$	(375	)

Summary of Maturities of Securities

Note 3.Available-for-Sale-Securities (Continued)

The following is a summary of maturities of securities at December 31, 2018 and 2017. Amounts are shown by contractual maturity. Because borrowers of the underlying collateral for mortgage-backed securities have the right to prepay obligations with or without prepayment penalties, at any time, these securities are included as a total within the table.

	December 31, 2018
	Available-for-Sale
	Amortized		Fair
	Cost		Value
U.S. Government and Federal Agency Securities:
Amounts maturing:
Three months or less	$	4,997	$	4,995
After three months through one year		4,554		4,497
After one year through five years		16,370		16,018
		25,921		25,510
Mortgage-Backed Securities		1,648		1,634
Total	$	27,569	$	27,144
	December 31, 2017
	Available-for-Sale
	Amortized		Fair
	Cost		Value
U.S. Government and Federal Agency Securities:
Amounts maturing:
Three months or less	$	—	$	—
After three months through one year		1,990		1,977
After one year through five years		22,921		22,575
		24,911		24,552
Mortgage-Backed Securities		4,323		4,345
Total	$	29,234	$	28,897