Note 7 - Loans Receivable and Allowance for Credit Losses - Activity in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended					6 Months Ended	9 Months Ended
	Sep. 30, 2022		Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2022	Sep. 30, 2022		Sep. 30, 2021
Balance	$ 20,997		$ 23,156	$ 18,964	$ 16,110	$ 18,964	$ 18,964		$ 12,975
Charge-offs	(27)		(3,684)	(67)	(1)	(3,751)	(3,778)		(108)
Recoveries	386		677	17	209	694	1,080		451
Provisions (credits)(1)	3,899	[1]			900		4,749	[2]	3,900
Balance	25,255		20,997	23,156	17,218	20,997	25,255		17,218
Balance					17,218				17,218
Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance				4,240		4,240	4,240
Commercial Real Estate Portfolio Segment [Member]
Balance	3,541		4,048	5,802	5,919	5,802	5,802		4,394
Charge-offs	0		(621)	0	0	(621)	(621)		0
Recoveries	215		0	0	0	0	215		0
Provisions (credits)(1)	82	[1]			265		(93)	[2]	1,790
Balance	3,838		3,541	4,048	6,184	3,541	3,838		6,184
Balance					6,184				6,184
Commercial Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance				(1,465)		(1,465)	(1,465)
Construction and Land Development Portfolio Segment [Member]
Balance	1,522		2,110	1,544	1,133	1,544	1,544		948
Charge-offs	0		0	0	0	0	0		0
Recoveries	0		0	0	0	0	0		0
Provisions (credits)(1)	388	[1]			(43)		(737)	[2]	142
Balance	1,910		1,522	2,110	1,090	1,522	1,910		1,090
Balance					1,090				1,090
Construction and Land Development Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance				1,103		1,103	1,103
Commercial Portfolio Segment [Member]
Balance	2,323			2,856	1,503	2,856	2,856		1,367
Charge-offs	0				0		(2,161)		(60)
Recoveries	149				12		166		162
Provisions (credits)(1)	465	[1]			181		1,514	[2]	227
Balance	2,937		2,323		1,696	2,323	2,937		1,696
Balance					1,696				1,696
Commercial Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance				562		562	562
Owner Occupied Real Estate [Member]
Balance	5,963		6,166	3,158	2,440	3,158	3,158		2,374
Charge-offs	0		(787)	0	0	(787)	(787)		0
Recoveries	0		590	7	48	597	597		88
Provisions (credits)(1)	298	[1]			420		(463)	[2]	446
Balance	6,261		5,963	6,166	2,908	5,963	6,261		2,908
Balance					2,908				2,908
Owner Occupied Real Estate [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance				3,756		3,756	3,756
Consumer Portfolio Segment [Member]
Balance	691		728	629	717	629	629		723
Charge-offs	(27)		(115)	(67)	(1)	(182)	(209)		(48)
Recoveries	22		80	0	149	81	102		201
Provisions (credits)(1)	54	[1]			(213)		180	[2]	(224)
Balance	740		691	728	652	691	740		652
Balance					652				652
Consumer Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance				38		38	38
Residential Portfolio Segment [Member]
Balance	6,957		5,620	4,922	4,270	4,922	4,922		3,025
Charge-offs	0		0	0	0	0	0		0
Recoveries	0		0	0	0	0	0		0
Provisions (credits)(1)	2,612	[1]			282		4,348	[2]	1,527
Balance	9,569		6,957	5,620	4,552	6,957	9,569		4,552
Balance					4,552				4,552
Residential Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance				299		299	299
Unallocated Financing Receivables [Member]
Balance	0		0	53	128	53	53		144
Charge-offs	0		0	0	0	0	0		0
Recoveries	0		0	0	0	0	0		0
Provisions (credits)(1)	0	[1]			8		0	[2]	(8)
Balance	$ 0		$ 0	0	136	0	0		136
Balance					$ 136				$ 136
Unallocated Financing Receivables [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance				$ (53)		$ (53)	$ (53)

[1] Provision to roll forward the allowance for credit losses excludes a provision of $99,000 for off-balance sheet commitments. The ACL on off-balance sheet commitments as of September 30, 2022 was $604,000.

[2] Provision to roll forward the allowance for credit losses excludes a provision of $7,000 for off-balance sheet commitments. The ACL on off-balance sheet commitments as of September 30, 2022 was $604,000.