Schedule of securities amortized cost and estimated fair value (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Marketable Securities [Line Items]
Amortized Cost	$ 104,821	$ 104,556
Gross Unrealized Gains	12	24
Gross Unrealized Losses	15,819	14,775
Approximate Fair Value	89,014	89,805
US Treasury Securities [Member]
Marketable Securities [Line Items]
Amortized Cost	10,637	11,643
Gross Unrealized Gains
Gross Unrealized Losses	663	658
Approximate Fair Value	9,974	10,985
US Government Agencies Debt Securities [Member]
Marketable Securities [Line Items]
Amortized Cost	9,668	9,412
Gross Unrealized Gains	10	23
Gross Unrealized Losses	676	624
Approximate Fair Value	9,002	8,811
Taxable Municipal Notes [Member]
Marketable Securities [Line Items]
Amortized Cost	22,961	22,973
Gross Unrealized Gains
Gross Unrealized Losses	5,329	5,114
Approximate Fair Value	17,632	17,859
Corporate Debt Securities [Member]
Marketable Securities [Line Items]
Amortized Cost	3,000	3,002
Gross Unrealized Gains		1
Gross Unrealized Losses	265	315
Approximate Fair Value	2,735	2,688
Collateralized Mortgage-Backed Securities [Member]
Marketable Securities [Line Items]
Amortized Cost	58,555	57,526
Gross Unrealized Gains	2
Gross Unrealized Losses	8,886	8,064
Approximate Fair Value	$ 49,671	$ 49,462