Loans Receivables and Allowance for Credit Losses - Schedule of Credit Quality Indicators (Details) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Rating of Loans by Origination Year
Year one	$ 57,628,000	$ 1,505,000
Year two	4,107,000	113,284,000
Year three	83,154,000	168,463,000
Year four	110,905,000	128,522,000
Year five	116,538,000	19,425,000
Prior	122,265,000	174,944,000
Revolving	97,964,000	101,329,000
Total Loans Receivable Gross	592,562,000	707,472,000
Current period gross charge-offs
Year one	0	0
Year two	0	313,000
Year three	93,000	5,997,000
Year four	2,337,000	635,000
Year five	578,000	0
Prior	11,000	15,648,000
Revolving	0	0
Total Loans Receivable Gross	3,020,000	22,593,000	$ 18,417,000
Pass
Rating of Loans by Origination Year
Year one	57,628,000	1,505,000
Year two	4,107,000	107,869,000
Year three	82,467,000	160,875,000
Year four	106,242,000	116,654,000
Year five	111,182,000	12,470,000
Prior	114,417,000	166,510,000
Revolving	88,547,000	93,635,000
Total Loans Receivable Gross	564,590,000	659,518,000
Special mention
Rating of Loans by Origination Year
Year one	0	0
Year two	0	3,986,000
Year three	2,000	18,000
Year four	17,000	39,000
Year five	34,000	1,053,000
Prior	2,099,000	2,380,000
Revolving	4,206,000	7,389,000
Total Loans Receivable Gross	6,358,000	14,865,000
Substandard
Rating of Loans by Origination Year
Year one	0	0
Year two	0	1,429,000
Year three	685,000	7,570,000
Year four	4,646,000	11,829,000
Year five	5,322,000	5,902,000
Prior	5,750,000	6,054,000
Revolving	5,211,000	305,000
Total Loans Receivable Gross	21,613,000	33,089,000
Commercial Real Estate
Rating of Loans by Origination Year
Year one	41,492,000	0
Year two	0	107,702,000
Year three	79,031,000	136,834,000
Year four	93,796,000	96,890,000
Year five	77,347,000	2,318,000
Prior	54,524,000	75,745,000
Revolving	0	0
Total Loans Receivable Gross	346,191,000	419,489,000
Current period gross charge-offs
Year one	0	0
Year two	0	0
Year three	0	0
Year four	547,000	0
Year five	232,000	0
Prior	0	13,889,000
Revolving	0	0
Total Loans Receivable Gross	778,000	13,889,000	6,346,000
Commercial Real Estate | Pass
Rating of Loans by Origination Year
Year one	41,492,000	0
Year two	0	102,906,000
Year three	78,914,000	130,143,000
Year four	89,538,000	88,275,000
Year five	72,868,000	2,085,000
Prior	48,983,000	69,858,000
Revolving	0	0
Total Loans Receivable Gross	331,795,000	393,267,000
Commercial Real Estate | Special mention
Rating of Loans by Origination Year
Year one	0	0
Year two	0	3,697,000
Year three	0	0
Year four	0	0
Year five	0	0
Prior	799,000	430,000
Revolving	0	0
Total Loans Receivable Gross	799,000	4,127,000
Commercial Real Estate | Substandard
Rating of Loans by Origination Year
Year one	0	0
Year two	0	1,099,000
Year three	117,000	6,691,000
Year four	4,258,000	8,615,000
Year five	4,479,000	233,000
Prior	4,742,000	5,457,000
Revolving	0	0
Total Loans Receivable Gross	13,596,000	22,095,000
Residential Real Estate
Rating of Loans by Origination Year
Year one	1,234,000	372,000
Year two	3,119,000	0
Year three	0	1,218,000
Year four	5,283,000	2,811,000
Year five	20,726,000	10,599,000
Prior	48,178,000	76,423,000
Revolving	1,128,000	792,000
Total Loans Receivable Gross	79,667,000	92,215,000
Current period gross charge-offs
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	0	21,000
Revolving	0	0
Total Loans Receivable Gross	0	21,000	515,000
Residential Real Estate | Pass
Rating of Loans by Origination Year
Year one	1,234,000	372,000
Year two	3,119,000	0
Year three	0	1,218,000
Year four	5,283,000	2,811,000
Year five	20,726,000	9,546,000
Prior	47,213,000	74,937,000
Revolving	1,128,000	792,000
Total Loans Receivable Gross	78,703,000	89,676,000
Residential Real Estate | Special mention
Rating of Loans by Origination Year
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	1,053,000
Prior	907,000	1,377,000
Revolving	0	0
Total Loans Receivable Gross	907,000	2,430,000
Residential Real Estate | Substandard
Rating of Loans by Origination Year
Year one	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
Prior	57,000	109,000
Revolving	0	0
Total Loans Receivable Gross	57,000	109,000
Commercial and Industrial
Rating of Loans by Origination Year
Year one	14,710,000	843,000
Year two	726,000	2,996,000
Year three	3,833,000	14,111,000
Year four	11,410,000	20,775,000
Year five	18,457,000	6,508,000
Prior	6,422,000	7,471,000
Revolving	91,266,000	76,904,000
Total Loans Receivable Gross	146,825,000	129,608,000
Current period gross charge-offs
Year one	0	0
Year two	0	0
Year three	0	0
Year four	47,000	0
Year five	72,000	0
Prior	11,000	1,252,000
Revolving	0	0
Total Loans Receivable Gross	129,000	1,252,000	927,000
Commercial and Industrial | Pass
Rating of Loans by Origination Year
Year one	14,710,000	843,000
Year two	726,000	2,449,000
Year three	3,272,000	13,607,000
Year four	11,013,000	19,892,000
Year five	17,580,000	839,000
Prior	5,224,000	6,410,000
Revolving	82,101,000	69,462,000
Total Loans Receivable Gross	134,626,000	113,502,000
Commercial and Industrial | Special mention
Rating of Loans by Origination Year
Year one	0	0
Year two	0	289,000
Year three	2,000	18,000
Year four	17,000	39,000
Year five	34,000	0
Prior	392,000	573,000
Revolving	4,206,000	7,389,000
Total Loans Receivable Gross	4,651,000	8,308,000
Commercial and Industrial | Substandard
Rating of Loans by Origination Year
Year one	0	0
Year two	0	258,000
Year three	559,000	486,000
Year four	381,000	844,000
Year five	842,000	5,669,000
Prior	807,000	488,000
Revolving	4,959,000	53,000
Total Loans Receivable Gross	7,547,000	7,798,000
Consumer and Other
Rating of Loans by Origination Year
Year one	192,000	290,000
Year two	262,000	2,586,000
Year three	289,000	16,300,000
Year four	415,000	1,859,000
Year five	7,000	0
Prior	13,141,000	15,305,000
Revolving	5,570,000	23,633,000
Total Loans Receivable Gross	19,876,000	59,973,000
Current period gross charge-offs
Year one	0	0
Year two	0	313,000
Year three	93,000	5,997,000
Year four	1,744,000	635,000
Year five	232,000	0
Prior	0	486,000
Revolving	0	0
Total Loans Receivable Gross	2,069,000	7,431,000	10,479,000
Consumer and Other | Pass
Rating of Loans by Origination Year
Year one	192,000	290,000
Year two	262,000	2,514,000
Year three	280,000	15,907,000
Year four	407,000	1,846,000
Year five	7,000	0
Prior	12,997,000	15,305,000
Revolving	5,318,000	23,381,000
Total Loans Receivable Gross	19,464,000	59,243,000
Consumer and Other | Substandard
Rating of Loans by Origination Year
Year one	0	0
Year two	0	72,000
Year three	9,000	393,000
Year four	7,000	13,000
Year five	0	0
Prior	144,000	0
Revolving	252,000	252,000
Total Loans Receivable Gross	413,000	730,000
Construction
Rating of Loans by Origination Year
Year one		0
Year two		0
Year three		0
Year four		3,830,000
Year five		0
Prior		0
Revolving		0
Total Loans Receivable Gross	0	3,830,000
Current period gross charge-offs
Total Loans Receivable Gross	0	0	150,000
Construction | Pass
Rating of Loans by Origination Year
Year one		0
Year two		0
Year three		0
Year four		3,830,000
Year five		0
Prior		0
Revolving		0
Total Loans Receivable Gross		3,830,000
Construction to Permanent - CRE
Rating of Loans by Origination Year
Year one		0
Year two		0
Year three		0
Year four		2,357,000
Year five		0
Prior		0
Revolving		0
Total Loans Receivable Gross	0	2,357,000
Current period gross charge-offs
Year five	43,000
Total Loans Receivable Gross	$ 43,000	0	$ 0
Construction to Permanent - CRE | Substandard
Rating of Loans by Origination Year
Year one		0
Year two		0
Year three		0
Year four		2,357,000
Year five		0
Prior		0
Revolving		0
Total Loans Receivable Gross		$ 2,357,000