Note 4 - Loans and Allowance for Credit Losses - Class of Loans Risk Category (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Originated current year	$ 52,158		$ 52,158		$ 132,796
Originated year one	133,347		133,347		155,608
Originated year two	146,529		146,529		93,560
Originated year three	80,974		80,974		48,815
Originated year four	44,270		44,270		40,589
Originated prior	110,805		110,805		81,696
Revolving	70,501		70,501		69,350
Loans	638,584		638,584		622,414
Current period gross write-offs			0
Year one gross write-offs			25
Year two gross write-offs			92
Year three gross write-offs			20
Year four gross write-offs			5
Prior year gross write-offs			6
Revolving gross write-offs			37
Gross write-offs	85	$ 235	185	$ 510
Pass [Member]
Originated current year					131,765
Originated year one	132,330		132,330		153,463
Originated year two	143,274		143,274		92,602
Originated year three	80,076		80,076		46,761
Originated year four	42,337		42,337		39,445
Originated prior	104,973		104,973		79,380
Revolving	69,622		69,622		68,417
Loans	624,419		624,419		611,833
Current period gross write-offs			51,807
Special Mention [Member]
Originated current year					1,031
Originated year one	192		192		2,097
Originated year two	1,182		1,182		679
Originated year three	89		89		1,670
Originated year four	1,643		1,643		577
Originated prior	3,174		3,174		255
Revolving	640		640		749
Loans	6,960		6,960		7,058
Current period gross write-offs			40
Substandard [Member]
Originated current year					0
Originated year one	825		825		0
Originated year two	0		0		0
Originated year three	566		566		306
Originated year four	290		290		303
Originated prior	1,236		1,236		980
Revolving	239		239		184
Loans	3,467		3,467		1,773
Current period gross write-offs			311
Doubtful [Member]
Originated current year					0
Originated year one	0		0		48
Originated year two	2,073		2,073		279
Originated year three	243		243		78
Originated year four	0		0		264
Originated prior	1,422		1,422		1,081
Revolving	0		0		0
Loans	3,738		3,738		1,750
Current period gross write-offs			0
One-to-four Family Residential Construction [Member] | Construction [Member]
Originated current year	5,494		5,494		9,193
Originated year one	5,945		5,945		4,180
Originated year two	1,370		1,370		918
Originated year three	717		717		1,119
Originated year four	617		617		0
Originated prior	257		257		257
Revolving	0		0		0
Loans	14,400		14,400		15,667
Current period gross write-offs			0
Year one gross write-offs			0
Year two gross write-offs			0
Year three gross write-offs			0
Year four gross write-offs			0
Prior year gross write-offs			0
Revolving gross write-offs			0
Gross write-offs	(0)	(0)	(0)	(0)
One-to-four Family Residential Construction [Member] | Construction [Member] | Pass [Member]
Originated current year	5,494		5,494		9,193
Originated year one	5,945		5,945		4,180
Originated year two	1,370		1,370		831
Originated year three	630		630		1,119
Originated year four	617		617		0
Originated prior	257		257		257
Revolving	0		0		0
Loans	14,313		14,313		15,580
One-to-four Family Residential Construction [Member] | Construction [Member] | Special Mention [Member]
Originated current year	0		0		0
Originated year one	0		0		0
Originated year two	0		0		0
Originated year three	0		0		0
Originated year four	0		0		0
Originated prior	0		0		0
Revolving	0		0		0
Loans	0		0		0
One-to-four Family Residential Construction [Member] | Construction [Member] | Substandard [Member]
Originated current year	0		0		0
Originated year one	0		0		0
Originated year two	0		0		0
Originated year three	0		0		0
Originated year four	0		0		0
Originated prior	0		0		0
Revolving	0		0		0
Loans	0		0		0
One-to-four Family Residential Construction [Member] | Construction [Member] | Doubtful [Member]
Originated current year	0		0		0
Originated year one	0		0		0
Originated year two	0		0		87
Originated year three	87		87		0
Originated year four	0		0		0
Originated prior	0		0		0
Revolving	0		0		0
Loans	87		87		87
Other Consumer Loan [Member] | Consumer Portfolio Segment [Member]
Originated current year	10,914		10,914		23,335
Originated year one	20,041		20,041		13,906
Originated year two	10,976		10,976		7,662
Originated year three	5,472		5,472		2,604
Originated year four	1,555		1,555		846
Originated prior	8,238		8,238		5,446
Revolving	2,498		2,498		2,574
Loans	59,694		59,694		56,373
Current period gross write-offs			0
Year one gross write-offs			25
Year two gross write-offs			92
Year three gross write-offs			20
Year four gross write-offs			5
Prior year gross write-offs			2
Revolving gross write-offs			37
Gross write-offs			181	282
Other Consumer Loan [Member] | Consumer Portfolio Segment [Member] | Pass [Member]
Originated current year	10,914		10,914		23,335
Originated year one	20,041		20,041		13,906
Originated year two	10,976		10,976		7,662
Originated year three	5,472		5,472		2,604
Originated year four	1,555		1,555		846
Originated prior	8,238		8,238		5,446
Revolving	2,405		2,405		2,484
Loans	59,601		59,601		56,283
Other Consumer Loan [Member] | Consumer Portfolio Segment [Member] | Special Mention [Member]
Originated current year	0		0		0
Originated year one	0		0		0
Originated year two					0
Originated year three	0		0		0
Originated year four	0		0		0
Originated prior	0		0		0
Revolving	0		0		0
Loans	0		0		0
Other Consumer Loan [Member] | Consumer Portfolio Segment [Member] | Substandard [Member]
Originated current year	0		0		0
Originated year one	0		0		0
Originated year two	0		0		0
Originated year three	0		0		0
Originated year four	0		0		0
Originated prior	0		0		0
Revolving	93		93		90
Loans	93		93		90
Other Consumer Loan [Member] | Consumer Portfolio Segment [Member] | Doubtful [Member]
Originated current year	0		0		0
Originated year one	0		0		0
Originated year two	0		0		0
Originated year three	0		0		0
Originated year four	0		0		0
Originated prior	0		0		0
Revolving	0		0		0
Loans	0		0		0
One-to-four Family Loan [Member] | Residential Portfolio Segment [Member]
Originated current year	12,116		12,116		34,344
Originated year one	33,025		33,025		31,599
Originated year two	29,252		29,252		26,038
Originated year three	24,410		24,410		7,066
Originated year four	6,558		6,558		9,790
Originated prior	31,968		31,968		24,764
Revolving	0		0		0
Loans	137,329		137,329		133,601
Current period gross write-offs			0
Year one gross write-offs			0
Year two gross write-offs			0
Year three gross write-offs			0
Year four gross write-offs			0
Prior year gross write-offs			4
Revolving gross write-offs			0
Gross write-offs	3	29	4	31
One-to-four Family Loan [Member] | Residential Portfolio Segment [Member] | Pass [Member]
Originated current year	12,116		12,116		34,344
Originated year one	32,993		32,993		31,551
Originated year two	29,208		29,208		25,846
Originated year three	24,254		24,254		6,913
Originated year four	6,484		6,484		9,525
Originated prior	30,358		30,358		23,628
Revolving	0		0		0
Loans	135,413		135,413		131,807
One-to-four Family Loan [Member] | Residential Portfolio Segment [Member] | Special Mention [Member]
Originated current year	0		0		0
Originated year one	32		32		0
Originated year two	0		0		0
Originated year three	0		0		0
Originated year four	0		0		0
Originated prior	345		345		144
Revolving	0		0		0
Loans	377		377		144
One-to-four Family Loan [Member] | Residential Portfolio Segment [Member] | Substandard [Member]
Originated current year	0		0		0
Originated year one	0		0		0
Originated year two					0
Originated year three	0		0		75
Originated year four	74		74		265
Originated prior	399		399		155
Revolving	0		0		0
Loans	473		473		495
One-to-four Family Loan [Member] | Residential Portfolio Segment [Member] | Doubtful [Member]
Originated current year	0		0		0
Originated year one	0		0		48
Originated year two	44		44		192
Originated year three	156		156		78
Originated year four	0		0		0
Originated prior	866		866		837
Revolving	0		0		0
Loans	1,066		1,066		1,155
Commercial Real Estate Loan [Member] | Commercial Portfolio Segment [Member]
Originated current year	12,691		12,691		15,641
Originated year one	19,896		19,896		40,675
Originated year two	40,360		40,360		30,229
Originated year three	27,924		27,924		21,442
Originated year four	20,710		20,710		18,648
Originated prior	54,398		54,398		39,705
Revolving	1,368		1,368		2,305
Loans	177,347		177,347		168,645
Current period gross write-offs			0
Year one gross write-offs			0
Year two gross write-offs			0
Year three gross write-offs			0
Year four gross write-offs			0
Prior year gross write-offs			0
Revolving gross write-offs			0
Gross write-offs	(0)	(0)	(0)	(0)
Commercial Real Estate Loan [Member] | Commercial Portfolio Segment [Member] | Pass [Member]
Originated current year	12,380		12,380		14,818
Originated year one	19,083		19,083		40,675
Originated year two	39,260		39,260		29,656
Originated year three	27,358		27,358		19,589
Originated year four	18,894		18,894		18,231
Originated prior	50,970		50,970		38,818
Revolving	1,118		1,118		1,755
Loans	169,063		169,063		163,542
Commercial Real Estate Loan [Member] | Commercial Portfolio Segment [Member] | Special Mention [Member]
Originated current year	0		0		823
Originated year one	95		95		0
Originated year two	1,100		1,100		573
Originated year three	0		0		1,622
Originated year four	1,600		1,600		417
Originated prior	2,626		2,626		62
Revolving	250		250		550
Loans	5,671		5,671		4,047
Commercial Real Estate Loan [Member] | Commercial Portfolio Segment [Member] | Substandard [Member]
Originated current year	311		311		0
Originated year one	718		718		0
Originated year two	0		0		0
Originated year three	566		566		231
Originated year four	216		216		0
Originated prior	802		802		825
Revolving	0		0		0
Loans	2,613		2,613		1,056
Commercial Real Estate Loan [Member] | Commercial Portfolio Segment [Member] | Doubtful [Member]
Originated current year	0		0		0
Originated year one	0		0		0
Originated year two	0		0		0
Originated year three	0		0		0
Originated year four	0		0		0
Originated prior	0		0		0
Revolving	0		0		0
Loans	0		0		0
Home Equity and Second Mortgage [Member] | Residential Portfolio Segment [Member]
Originated current year	1,214		1,214		5,267
Originated year one	4,853		4,853		4,380
Originated year two	3,950		3,950		529
Originated year three	465		465		232
Originated year four	200		200		427
Originated prior	881		881		517
Revolving	53,098		53,098		51,949
Loans	64,661		64,661		63,301
Current period gross write-offs			0
Year one gross write-offs			0
Year two gross write-offs			0
Year three gross write-offs			0
Year four gross write-offs			0
Prior year gross write-offs			0
Revolving gross write-offs			0
Gross write-offs	(0)	9	(0)	9
Home Equity and Second Mortgage [Member] | Residential Portfolio Segment [Member] | Pass [Member]
Originated current year	1,214		1,214		5,267
Originated year one	4,853		4,853		4,380
Originated year two	3,950		3,950		529
Originated year three	465		465		232
Originated year four	200		200		163
Originated prior	379		379		327
Revolving	52,752		52,752		51,794
Loans	63,813		63,813		62,692
Home Equity and Second Mortgage [Member] | Residential Portfolio Segment [Member] | Special Mention [Member]
Originated current year	0		0		0
Originated year one	0		0		0
Originated year two	0		0		0
Originated year three	0		0		0
Originated year four	0		0		0
Originated prior	0		0		0
Revolving	200		200		61
Loans	200		200		61
Home Equity and Second Mortgage [Member] | Residential Portfolio Segment [Member] | Substandard [Member]
Originated current year	0		0		0
Originated year one	0		0		0
Originated year two	0		0		0
Originated year three	0		0		0
Originated year four	0		0		0
Originated prior	0		0		0
Revolving	146		146		94
Loans	146		146		94
Home Equity and Second Mortgage [Member] | Residential Portfolio Segment [Member] | Doubtful [Member]
Originated current year	0		0		0
Originated year one	0		0		0
Originated year two	0		0		0
Originated year three	0		0		0
Originated year four	0		0		264
Originated prior	502		502		190
Revolving	0		0		0
Loans	502		502		454
Commercial Business [Member] | Commercial Portfolio Segment [Member]
Originated current year	4,404		4,404		14,925
Originated year one	13,050		13,050		14,700
Originated year two	13,392		13,392		11,155
Originated year three	9,793		9,793		5,754
Originated year four	5,245		5,245		5,510
Originated prior	5,264		5,264		3,646
Revolving	13,537		13,537		12,522
Loans	64,685		64,685		68,212
Current period gross write-offs			0
Year one gross write-offs			0
Year two gross write-offs			0
Year three gross write-offs			0
Year four gross write-offs			0
Prior year gross write-offs			0
Revolving gross write-offs			0
Gross write-offs	(0)	33	(0)	188
Commercial Business [Member] | Commercial Portfolio Segment [Member] | Pass [Member]
Originated current year	4,364		4,364		14,717
Originated year one	12,878		12,878		12,603
Originated year two	11,281		11,281		11,049
Originated year three	9,704		9,704		5,706
Originated year four	5,202		5,202		5,312
Originated prior	5,074		5,074		3,646
Revolving	13,347		13,347		12,384
Loans	61,850		61,850		65,417
Commercial Business [Member] | Commercial Portfolio Segment [Member] | Special Mention [Member]
Originated current year	40		40		208
Originated year one	65		65		2,097
Originated year two	82		82		106
Originated year three	89		89		48
Originated year four	43		43		160
Originated prior	155		155		0
Revolving	190		190		138
Loans	664		664		2,757
Commercial Business [Member] | Commercial Portfolio Segment [Member] | Substandard [Member]
Originated current year	0		0		0
Originated year one	107		107		0
Originated year two	0		0		0
Originated year three	0		0		0
Originated year four	0		0		38
Originated prior	35		35		0
Revolving	0		0		0
Loans	142		142		38
Commercial Business [Member] | Commercial Portfolio Segment [Member] | Doubtful [Member]
Originated current year	0		0		0
Originated year one	0		0		0
Originated year two	2,029		2,029		0
Originated year three	0		0		0
Originated year four	0		0		0
Originated prior	0		0		0
Revolving	0		0		0
Loans	2,029		2,029		0
Other Construction, Development and Land [Member] | Construction [Member]
Originated current year	4,686		4,686		26,717
Originated year one	32,970		32,970		35,673
Originated year two	36,745		36,745		7,495
Originated year three	3,577		3,577		2,655
Originated year four	1,571		1,571		1,231
Originated prior	3,712		3,712		2,898
Revolving	0		0		0
Loans	83,261		83,261		76,669
Current period gross write-offs			0
Year one gross write-offs			0
Year two gross write-offs			0
Year three gross write-offs			0
Year four gross write-offs			0
Prior year gross write-offs			0
Revolving gross write-offs			0
Gross write-offs	(0)	(0)	(0)	(0)
Other Construction, Development and Land [Member] | Construction [Member] | Pass [Member]
Originated current year	4,686		4,686		26,717
Originated year one	32,970		32,970		35,673
Originated year two	36,745		36,745		7,495
Originated year three	3,577		3,577		2,655
Originated year four	1,571		1,571		1,231
Originated prior	3,610		3,610		2,795
Revolving	0		0		0
Loans	83,159		83,159		76,566
Other Construction, Development and Land [Member] | Construction [Member] | Special Mention [Member]
Originated current year	0		0		0
Originated year one	0		0		0
Originated year two	0		0		0
Originated year three	0		0		0
Originated year four	0		0		0
Originated prior	48		48		49
Revolving	0		0		0
Loans	48		48		49
Other Construction, Development and Land [Member] | Construction [Member] | Substandard [Member]
Originated current year	0		0		0
Originated year one	0		0		0
Originated year two	0		0		0
Originated year three	0		0		0
Originated year four	0		0		0
Originated prior	0		0		0
Revolving	0		0		0
Loans	0		0		0
Other Construction, Development and Land [Member] | Construction [Member] | Doubtful [Member]
Originated current year	0		0		0
Originated year one	0		0		0
Originated year two	0		0		0
Originated year three	0		0		0
Originated year four	0		0		0
Originated prior	54		54		54
Revolving	0		0		0
Loans	54		54		54
Multifamily [Member] | Residential Portfolio Segment [Member]
Originated current year	639		639		3,374
Originated year one	3,567		3,567		10,495
Originated year two	10,484		10,484		9,534
Originated year three	8,616		8,616		7,943
Originated year four	7,814		7,814		4,137
Originated prior	6,087		6,087		4,463
Revolving	0		0		0
Loans	37,207		37,207		39,946
Current period gross write-offs			0
Year one gross write-offs			0
Year two gross write-offs			0
Year three gross write-offs			0
Year four gross write-offs			0
Prior year gross write-offs			0
Revolving gross write-offs			0
Gross write-offs	(0)	$ (0)	(0)	$ (0)
Multifamily [Member] | Residential Portfolio Segment [Member] | Pass [Member]
Originated current year	639		639		3,374
Originated year one	3,567		3,567		10,495
Originated year two	10,484		10,484		9,534
Originated year three	8,616		8,616		7,943
Originated year four	7,814		7,814		4,137
Originated prior	6,087		6,087		4,463
Revolving	0		0		0
Loans	37,207		37,207		39,946
Multifamily [Member] | Residential Portfolio Segment [Member] | Special Mention [Member]
Originated current year	0		0		0
Originated year one	0		0		0
Originated year two	0		0		0
Originated year three	0		0		0
Originated year four	0		0		0
Originated prior	0		0		0
Revolving	0		0		0
Loans	0		0		0
Multifamily [Member] | Residential Portfolio Segment [Member] | Substandard [Member]
Originated current year	0		0		0
Originated year one	0		0		0
Originated year two	0		0		0
Originated year three	0		0		0
Originated year four	0		0		0
Originated prior	0		0		0
Revolving	0		0		0
Loans	0		0		0
Multifamily [Member] | Residential Portfolio Segment [Member] | Doubtful [Member]
Originated current year	0		0		0
Originated year one	0		0		0
Originated year two	0		0		0
Originated year three	0		0		0
Originated year four	0		0		0
Originated prior	0		0		0
Revolving	0		0		0
Loans	$ 0		$ 0		$ 0