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Available-for-sale securities - Schedule of Investment Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	$ 100,247	$ 110,056
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	(20,255)	(20,869)
Fair Value	79,992	89,187
U. S. Government agency and mortgage-backed securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	75,689	80,500
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	(15,466)	(14,829)
Fair Value	60,223	65,671
Corporate bonds
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	15,996	17,995
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	(3,261)	(4,229)
Fair Value	12,735	13,766
Subordinated notes
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	4,000	5,000
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	(539)	(773)
Fair Value	3,461	4,227
SBA loan pools
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	4,562	6,002
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	(989)	(965)
Fair Value	$ 3,573	5,037
Municipal bonds
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost		559
Gross Unrealized Gains		0
Gross Unrealized (Losses)		(73)
Fair Value		$ 486

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