Note 4 - Loans and Allowance for Credit Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Allowance for loan losses			$ 4,260	$ 4,284	$ 4,284
Provision for loan losses			314	(59)
Charge-offs	$ (356)	$ (155)	(356)	(156)	(162)
Charge-offs	356	155	356	156	162
Recoveries	11	6	15	12	24
Allowance for loan losses	4,233	4,081	4,233	4,081	4,260
Allowance for loan losses ending balance evaluated for impairment individually	300	392	300	392	360
Allowance for loan losses ending balance evaluated for impairment collectively	3,933	3,690	3,933	3,690	3,899
Outstanding loan balances evaluated for impairment individually	577	2,715	577	2,715	2,710
Outstanding loan balances evaluated for impairment collectively	619,632	548,018	619,632	548,018	585,253
Accounting Standards Update 2016-13 [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Provision for loan losses					114
Commercial Real Estate Portfolio Segment [Member]
Allowance for loan losses			2,481	2,448	2,448
Provision for loan losses			821	102	33
Charge-offs			(356)	0	0
Charge-offs			356	0	0
Recoveries			0	0	0
Allowance for loan losses	2,946	2,550	2,946	2,550	2,481
Allowance for loan losses ending balance evaluated for impairment individually	300	392	300	392	360
Allowance for loan losses ending balance evaluated for impairment collectively	2,130	2,160	2,130	2,160	2,122
Outstanding loan balances evaluated for impairment individually	307	2,442	307	2,442	2,440
Outstanding loan balances evaluated for impairment collectively	415,895	372,563	415,895	372,563	395,686
Construction and Land Development [Member]
Allowance for loan losses			478	253	253
Provision for loan losses			(18)	(48)	225
Charge-offs			0	0	0
Charge-offs			0	0	0
Recoveries			0	0	0
Allowance for loan losses	460	205	460	205	478
Allowance for loan losses ending balance evaluated for impairment individually	0	0	0	0	0
Allowance for loan losses ending balance evaluated for impairment collectively	460	205	460	205	478
Outstanding loan balances evaluated for impairment individually	0	0	0	0	0
Outstanding loan balances evaluated for impairment collectively	31,032	19,712	31,032	19,712	27,357
Residential Portfolio Segment [Member]
Allowance for loan losses			751	1,013	1,013
Provision for loan losses			(547)	(157)	(281)
Charge-offs			0	0	(5)
Charge-offs			0	0	5
Recoveries			15	12	24
Allowance for loan losses	219	868	219	868	751
Allowance for loan losses ending balance evaluated for impairment individually	0	0	0	0	0
Allowance for loan losses ending balance evaluated for impairment collectively	735	868	735	868	751
Outstanding loan balances evaluated for impairment individually	270	273	270	273	270
Outstanding loan balances evaluated for impairment collectively	115,456	110,657	115,456	110,657	111,629
Commercial Portfolio Segment [Member]
Allowance for loan losses			513	494	494
Provision for loan losses			95	97	171
Charge-offs			0	(153)	(152)
Charge-offs			0	153	152
Recoveries			0	0	0
Allowance for loan losses	608	438	608	438	513
Allowance for loan losses ending balance evaluated for impairment individually	0	0	0	0	0
Allowance for loan losses ending balance evaluated for impairment collectively	608	437	608	437	512
Outstanding loan balances evaluated for impairment individually	0	0	0	0	0
Outstanding loan balances evaluated for impairment collectively	56,975	44,918	56,975	44,918	50,405
Consumer Portfolio Segment [Member]
Allowance for loan losses			4	2	2
Provision for loan losses			(4)	4	7
Charge-offs			0	(3)	(5)
Charge-offs			0	3	5
Recoveries			0	0	0
Allowance for loan losses	0	3	0	3	4
Allowance for loan losses ending balance evaluated for impairment individually	0	0	0	0	0
Allowance for loan losses ending balance evaluated for impairment collectively	0	3	0	3	4
Outstanding loan balances evaluated for impairment individually	0	0	0	0	0
Outstanding loan balances evaluated for impairment collectively	544	168	544	168	176
Unallocated Financing Receivables [Member]
Allowance for loan losses			33	74	74
Provision for loan losses			(33)	(57)	(41)
Charge-offs			0	0	0
Charge-offs			(0)	0	(0)
Recoveries			0	0	0
Allowance for loan losses	0	17	0	17	33
Allowance for loan losses ending balance evaluated for impairment individually	0	0	0	0	0
Allowance for loan losses ending balance evaluated for impairment collectively	0	17	0	17	33
Outstanding loan balances evaluated for impairment individually	0	0	0	0	0
Outstanding loan balances evaluated for impairment collectively	$ 0	$ 0	$ 0	$ 0	$ 0

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

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