Segment Reporting - Segment information (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) segment	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | segment			2
Revenues
Interest income	$ 8,099,000	$ 6,731,000	$ 15,682,000	$ 12,999,000
Mortgage banking income, net	386,000	1,090,000	864,000	1,969,000
Other revenues	835,000	848,000	1,614,000	1,598,000
Total revenues	9,320,000	8,669,000	18,160,000	16,566,000
Expenses
Recovery of credit losses				(400,000)	$ (300,000)
Interest expense	1,975,000	410,000	3,193,000	818,000
Salaries and benefits	3,415,000	3,423,000	6,863,000	6,947,000
Other expenses	2,417,000	2,091,000	4,726,000	4,249,000
Total operating expenses	7,807,000	5,924,000	14,782,000	11,614,000
Income (loss) before income taxes	1,513,000	2,745,000	3,378,000	4,952,000
Income tax expense (benefit)	274,000	555,000	599,000	962,000
Net income	1,239,000	2,190,000	2,779,000	3,990,000
Total assets	754,655,000	752,597,000	754,655,000	752,597,000	$ 723,270,000
Eliminations [Member]
Revenues
Mortgage banking income, net	(224,000)	(32,000)	(284,000)	(58,000)
Other revenues	(43,000)	(45,000)	(86,000)	(89,000)
Total revenues	(267,000)	(77,000)	(370,000)	(147,000)
Expenses
Other expenses	(267,000)	(77,000)	(370,000)	(147,000)
Total operating expenses	(267,000)	(77,000)	(370,000)	(147,000)
Total assets	(27,235,000)	(28,012,000)	(27,235,000)	(28,012,000)
Commercial Banking | Operating Segments [Member]
Revenues
Interest income	7,998,000	6,653,000	15,541,000	12,878,000
Other revenues	878,000	893,000	1,700,000	1,687,000
Total revenues	8,876,000	7,546,000	17,241,000	14,565,000
Expenses
Recovery of credit losses				(400,000)
Interest expense	1,975,000	410,000	3,193,000	818,000
Salaries and benefits	2,694,000	2,608,000	5,436,000	5,253,000
Other expenses	2,391,000	1,851,000	4,529,000	3,758,000
Total operating expenses	7,060,000	4,869,000	13,158,000	9,429,000
Income (loss) before income taxes	1,816,000	2,677,000	4,083,000	5,136,000
Income tax expense (benefit)	338,000	540,000	747,000	1,000,000
Net income	1,478,000	2,137,000	3,336,000	4,136,000
Total assets	764,034,000	761,749,000	764,034,000	761,749,000
Mortgage Banking | Operating Segments [Member]
Revenues
Interest income	101,000	78,000	141,000	121,000
Mortgage banking income, net	610,000	1,122,000	1,148,000	2,027,000
Total revenues	711,000	1,200,000	1,289,000	2,148,000
Expenses
Salaries and benefits	721,000	815,000	1,427,000	1,694,000
Other expenses	293,000	317,000	567,000	638,000
Total operating expenses	1,014,000	1,132,000	1,994,000	2,332,000
Income (loss) before income taxes	(303,000)	68,000	(705,000)	(184,000)
Income tax expense (benefit)	(64,000)	15,000	(148,000)	(38,000)
Net income	(239,000)	53,000	(557,000)	(146,000)
Total assets	$ 17,856,000	$ 18,860,000	$ 17,856,000	$ 18,860,000