Securities Available for Sale - Summary of Fair Value of Available for Sale Securities and Related Gross Unrealized Gains and Losses (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024		Dec. 31, 2023
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 31,830		$ 32,247
Gross Unrealized Gains	5		9
Gross Unrealized Losses	(4,113)		(3,900)
Estimated Fair Value	27,722		28,356
U.S Government Sponsored Entities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	5,990		5,990
Gross Unrealized Gains	0		0
Gross Unrealized Losses	(728)		(704)
Estimated Fair Value	5,262		5,286
Municipal - Taxable
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	14,295		14,305
Gross Unrealized Gains	5		9
Gross Unrealized Losses	(2,645)		(2,522)
Estimated Fair Value	11,655		11,792
Municipal - Tax Exempt
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	945		945
Gross Unrealized Gains	0		0
Gross Unrealized Losses	(39)		(28)
Estimated Fair Value	906		917
Residential Mortage-Backed
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	9,249		9,543
Gross Unrealized Gains	0		0
Gross Unrealized Losses	(665)		(600)
Estimated Fair Value	8,584		8,943
Commercial Mortgage-Backed
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	995		992
Gross Unrealized Gains	0		0
Gross Unrealized Losses	(13)		(16)
Estimated Fair Value	982		976
SBA Guaranteed Debenture
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	356		472
Gross Unrealized Gains	0	[1]	0
Gross Unrealized Losses	(23)		(30)
Estimated Fair Value	$ 333	[1]	$ 442

[1] Small Business Administration